Wednesday, September 24, 2014

HOW TO KNOW WHEN MENOPAUSE IS COMING

Menopause, that biological milestone in our lives, typically announces its impending arrival by menstrual irregularity, fatigue, hot flashes and night sweats. There are also subtle physical and psychological symptoms that we experience, culminating in the end of the familiar monthly menstrual cycle. If you are experiencing any of these symptoms or are approaching 40 to 45 years, it is wise to discuss these issues with your doctor.
Strictly defined, the very last day of menstruation is called menopause after it has stopped for a period of twelve months. This end of menstrual cycling usually occurs between the ages of 40 and 60 years, with the average age being 51. Menopause can be a welcome relief from the fear of pregnancy and painful or irregular bleeding often accompanied by menstrual migraine and premenstrual tension. Women are unique beings who, unlike females of other species, continue to live long after the end of their fertility. In the 1990s, a woman can look forward to another 30 years or longer after her menopause, because of the advances in medical science and better socioeconomic conditions.
This end of the reproductive years is known by various names — the change, the climacteric and, most popularly, menopause. The word menopause is derived from two words - the Greek meno meaning month and pause meaning cessation. Although menopause technically refers to that one day in a woman’s life when her periods stop, the effects of that loss of reproductive (ovarian) function extend over years, both before and after, that one day. The word climacteric is used to define these years of physical and emotional changes.
Since the duration of these midlife changes is about 20 years in the context of chronic illness, endocrine disorders, menstrual problems, fertility problems; about ten years ago 2001 it was decided to study the changes of the reproductive aging. The scientists of five different countries and multiple disciplines sat to classify them into different stages. After ten years a more comprehensive basis for assessing reproductive maturity is described. The first stages are like normal reproductive function with regular menstrual cycle, later in this stage the cycles can sometimes be irregular, the fertility decreases and the main pituitary hormone for the maturation of the egg (FSH) can increase. At this stage the patient can have some symptoms such as hot flashes in the premenstrual stage, and premenstrual tension. In the following stages often called perimenopause when the menstrual cycle varies the fertility decreases. The hormone studies are often done especially in women who are anxious to have a baby late in life. The FSH is variable. The two other hormones which we have not elaborated on are called Antimullarian and Inhibin B are low. The number of maturing follicles in the ovary is low. The women start having hot flashes. In the later part of this perimenopause the FSH is usually high( Should be done on the second day of the cycle) and the symptoms become pronounced.
In the final stages of this menstrual cycle stops and when it has stopped for one year it is called menopause and the FSH is usually high, and Antimullarian Hormone and Inhibin B is very low. The chances of pregnancy are almost nil. Personally I have seen two women having a baby at 54 and 56 years of age. Later on these women start getting symptoms related to external genitalia (Painful dry vagina, painful sex) and urinary symptoms, such as poor control and repeated urinary infections. Recently this has been studied and called pelvic syndrome of menopause, these late symptoms get worse and never improve. Many clinicians call these changing years as menopause transition. I agree this system of classifying the reproductive aging is very useful as we have no international diagnosis of menopause syndrome. It is mainly based on menstrual cycle, ovarian aging and supportive criteria. Depending on your menstrual cycle symptomatology and supportive criteria you can assess when your menopause is coming irrespective of your age and nationality. 
Surgical menopause
The surgical removal of both ovaries (called bilateral oophorectomy) is sometimes necessary in the treatment of breast cancer or other conditions. Such removal of the ovaries results, of course, in the sudden loss of a woman’s ovarian hormones, and produces a surgical menopause. The symptoms that result from a surgical menopause can be every bit as distressing as, and sometimes even more than, a normal menopause.
Hysterectomy (the surgical removal of the uterus) does not induce a true menopause, because, although the periods stop, the ovaries continue to manufacture the female hormones in the normal cyclical way.
Menopause sometimes occurs about five years earlier in women who have had a hysterectomy and in women who smoke. For these women, menopausal symptoms, rather than the cessation of periods, herald the start of menopause. For some women, a blood test may be needed to confirm menopause.
Premature menopause
If menopause happens before 40 years of age it is called premature menopause. If it happens very early, for example, in the 20s, it is called ovarian failure rather than premature menopause. For younger women who have no periods for any length of time and are having symptoms, premature menopause is a possible explanation. Of course, pregnancy is also a possibility and it is therefore essential to exclude pregnancy before attributing the absence of periods to premature menopause.
Personal story
Premature menopause causing psychological stress
Gina, a 22-year-old law student and keen sportswoman of Italian descent, was a classic case of premature ovarian failure. She had not had a period for five months and she had occasional hot flushes. Her general practitioner who believed that her strenuous sports activity had caused her periods to cease referred her to a gynaecologist. Absence of periods often happens with excessively physically active young women involved in sports, gynmastics and aerobics. Simple emotional stress which affects young women can also cause infrequent or absent periods. However, various hormone blood level tests showed that she was suffering from premature menopause (premature ovarian failure). Gina took consolation from the rapid strides being made by the IVF fertility program which may eventually provide a solution to her problem. Immediately though, the answer was for her to go on HRT
Gina is having psychological counselling to cope with the devastating consequences of possibly never being able to have a child.

Women reaching middle age may experience several other problems unrelated to menopause or oestrogen deficiency. Problems of ageing such as arthritis and diseases such as diabetes and high blood pressure, often start at this time. Many social and psychological barriers also arise. A lack of career fulfillment, ageing parents to care for, marital disharmony and difficulties with growing children all create additional stress. The problems at middle age are therefore often a combination of biological (ageing and menopause), psychological and social upheavals.
 Specific menopausal symptom
Menopausal problems can be short-term or long-term. Hot flashes are the most obvious distressing symptom which brings a woman to a doctor. Other symptoms are general sweating, night sweats, muscle aches and pains, joint pains and a peculiar sensation of ants crawling on the skin called formication. A second group of symptoms include urogenital changes, manifested by dryness of the vagina, bladder problems such as the frequent desire to empty the bladder, and the loss of bladder control. These symptoms are due to atrophy (thinning) of the vagina and the urethra resulting from oestrogen deficiency. A third group of symptoms embrace psychosomatic ailments of confusion, loss of self—image, loss of memory, agitation, irritability, headaches not previously experienced and depression.
Long-term, postmenopausal women suffer an increased incidence of heart disease, a thinning of their bones (osteoporosis) and atrophy of the genital organs. It has been shown in studies that only 3% to 4% of women seek medical advice about these issues at this time.For treatment to be effective, it is important to distinguish between oestrogen deficiency symptoms and those caused by other problems.
Hot flushes
A hot flush is a sudden transient feeling of heat over the head, neck and chest, starting from the chest. It causes flushing of the skin which is obvious to other people. What causes a hot flush is not clearly understood, but it is likely to have something to do with the hypothalamus, a key nerve centre iii the brain. The reduced oestrogen levels irritate the neuroreceptors in the hypothalamus and these in turn signal the blood vessels in the skin to dilate. The increased blood flow through the dilated vessels heats up the skin, and causes the flush, While the skin temperature is rising during the several minutes of the flush, the body temperature drops by a few degrees. The cooling effect is accentuated because a chill feeling follows the evaporation of the newly formed perspiration from the skin. As a result of cooling, our body’s defence mechanism takes over and the adrenal gland releases a hormone called adrenaline. This stress response causes constriction of the blood vessels, and the hot flush ends.
The number of hot flushes women experience is variable. There may be several in a day, several a night or they may be continuous, one after another. Night sweats are the same phenomenon as hot flushes except that they occur during the night. Because they occur during sleep, the hot flush is not felt as much as the consequent cold sweat.
While hot flushes usually occur spontaneously, they may also be initiated by external factors such as sudden unexpected noise or a fright. A stressful work or home environment can greatly increase the frequency and severity of hot flushes. They do not have any serious long-term effects, although some of the insomnia and fatigue that occurs at menopause may be caused by the night sweats.
These symptoms are the commonest of menopausal problems. About seven out of every ten menopausal women experience hot flushes and more than 60% experience hot flushes for 12 months after menstruation stops. Hot flushes often continue for several years after menopause. For many women, they start a few years before their periods actually stop; that is, during the time when they are experiencing menstrual irregularities.
Hot flushes can be a very distressing condition. A general consensus is that hot flushes undermine a woman’s self-confidence making her self- conscious of her body in a negative way. They are a contributing factor to the psychological symptoms accompanying menopause.
Formication or the sensation of crawling under the skin is generally due to vascular changes of the skin early in menopause. Some more unusual symptoms include tingling in the ears and dizziness. Hormone replacement therapy (HRT) can bring dramatic relief from these symptoms within days.
Fatigue
Fatigue is a very common problem during menopause. There are several general causes for tiredness which should be excluded before associating it with menopause. For example, menstrual irregularities and heavy periods causing anaemia (lack of haemoglobin in the blood) can cause tiredness. An often overlooked cause of fatigue is poor diet and the stress of the daily demands of being a mother, running a home and a job at the same time.
It is important to evaluate your working hours and conditions before attributing fatigue entirely to menopause. It is also important to exclude any other disease or biological changes which may be responsible.
Urogenital symptoms
These symptoms occur three to eight years after menopause. They mainly affect female urinary activity and genital function. Lack of oestrogen is the main reason for changes in the urinary and genital tract. After menopause, there is a progressive deterioration in these functions, ultimately causing a dry, shrinking vagina which leads to diminished capacity and elasticity. Sexual stimulation is also diminished and it takes longer to reach orgasm. Vaginal atrophy and dryness varies from woman to woman. Larger women are less seriously affected because their body fats continue to produce and store an oestrogen called oestrone. Lack of oestrogen seriously affects urinary performance because the urinary bladder is believed to be oestrogen dependent.
Initially, there may be repeated infections (cystitis), frequency and urgency and some stress incontinence (spilling of urine under stress such as coughing, sneezing, laughing or dancing). As the years go by, these symptoms can become more serious and incontinence can become a great handicap.
In caring for the geriatric population, incontinence is a major determining factor in finding accommodation in nursing homes. The most common urological complaint a gynaecologist deals with is incontinence. For younger women, it is generally stress incontinence and, for older women, it is generally due to overflow. Difficulty in emptying the bladder completely is another problem experienced by elderly women.
The important role played by oestrogen in the proper functioning of the urinary system is not completely clear. The lack of oestrogen, together with a generalised loss of muscle tone, are the major factors in compromised urinary function after menopause. However, while oestrogen replacement helps many women with such difficulties, it does not help all. Thus, other causes of this particular symptom should be considered and treated accordingly.
Irregular or absent menstrual cycles
By definition, menopause is the end of the menstrual cycle. However, before menopause arrives, irregularity of cycles is common. Irregularity can be frequent periods, infrequent periods, too much bleeding or too little bleeding. The reason is that the failing ovaries are not ovulating;; there is no progesterone produced to ripen the lining of the uterus (the endometrium) and regulate the menstrual cycle. This is perhaps the earliest symptom of menopause and is often not recognised as such.
In the past, many women in their late 30s and early 40s who consulted their doctor about irregular periods were described as suffering from dysfunctional bleeding. This term means abnormal uterine bleeding in the absence of any uterine fibroids or other medical reason. The bleeding is generally due to a hormonal imbalance.
Other causes of abnormal bleeding and absent periods should be excluded before labelling this as menopausal. These problems can be due to a range of causes varying in severity from simple fibroids to uterine cancer or even pregnancy
Muscle and joint aches and pains
After the ovaries begin to fail, the ligaments and tissues which connect various parts of the skeletal system become lax resulting in decreased muscle strength. The looseness gives rise to a variety of aches and pains. Laxity of the muscles is accompanied by loss of elasticity of the ligaments and the cumulative effect is more aches and pains in the shoulders, elbows and back.
With age, we can also expect some degree of osteoporosis and consequent pain. Osteoporosis can cause fractures of the vertebrae and then curvature of the spine. When the curvature is very marked, it is known as dowager’s hump and results in loss of height.
With an adequate amount of physical activity, these symptoms are prevented as exercise enhances the wellbeing of the muscles, ligaments and the bones. Oestrogens are also believed to have some benefic all effects as an anti-inflammatory agent thus preventing pain as well as preventing osteoporosis.
A combination of lack of oestrogen, poor physical activity and menopausal changes exacerbate muscle aches and pains. Many women are treated as if they suffer from osteoarthritis and are often given aspirin and other non—steroidal anti-inflammatory drugs which can cause side—effects such as stomach ulcers.
Other symptoms
As the ovaries fail, there is a relative proportional increase of the male hormones, androgens, mainly testosterone and androstenedione. These hormones can lead to the appearance of pimples and facial hair, and the thinning and loss of scalp hair. HRT can improve these distressing conditions. Sometimes, a drug, Aldactone, can be used to neutralise androgens and decrease facial hair
Skin and hair
The skin constantly changes with age due to deterioration from excessive exposure to sun. The ageing of the skin starts at about 30 years. These changes are accentuated by the hormonal changes at menopause. At this time, the elastin and collagen in the skin decreases although it is not yet understood why. The loss of collagen, in the initial years of menopause is far more than in subsequent years. The deficiency of elastin and collagen causes wrinkles and dryness. Women who have been on prolonged corticosteroid therapy, or who suffer from adrenal disease, have diminished collagen tissue. Corticosteroids, commonly used for asthma, have an adverse effect on skin and bones.
HRT can be beneficial. Oestrogen and testosterone help the skin by protecting the loss of collagen and elastin, increasing the skin’s water content (called “hydration”) and improving blood circulation. Recent research has shown that skin changes often almost disappear within six months of starting HRT, after which there is no further significant improvement as there is an optimum collagen content that women achieve.
Acne at menopause can be treated by general cleansing of the skin, by nutritional creams and by HRT which restores the hormonal balance in favour of oestrogen. Some doctors use aldactone to neutralise the testosterones. This may result in side—effects such as depression, diminished sex drive and a tendency to a husky voice. These drugs have a place when acne is very severe.
At menopause, new facial hair can commonly appear. HRT can lessen facial hair. In severe cases, medication is prescribed for a few months at a• time. Simple depilatory creams may be used. Baldness is rarely seen in menopausal women; if it does occur, it is important for your doctor to:: exclude other causes of hair loss.
Care of our skin is important at any age. Australia has the world’s highest incidence of skin cancer. Avoid unnecessary exposure to the sun by using a broad-brimmed hat, wearing a long-sleeved top and using a SPF-15-plus protective sun cream every day
Other simple measures for skin care include correct diet and lifestyle factors such as reducing your intake of fat and salt, eating plenty of raw fruits and vegetables, drinking plenty of water, quitting smoking and cutting your alcohol consumption. Other positive aids to the good health and wellbeing of your skin are regular washing, gently massaging your skin with one of the many specialised skin brushes and using moisturising creams.
Personal story
Distressing male pattern hair distribution and hair loss
Claire, 49, a shop assistant, cried as she took off her hairpiece concealing a large bald patch. She described how she had been embarrassed and dismayed by her creeping hair loss over two years from menopause and chronic emotional stress. She was reassured that HRT could prevent the condition worsening and might even improve it. She was prescribed a hormonal combination of oestrogen and progestogen to combat the testosterone, the biological culprit. After eight months of HRT, her hair loss stabilised.
Formication
Formication is the sensation of crawling under the skin. The feeling is caused by vascular changes in the skin at the time of menopause. The condition usually improves or completely disappears soon after starting HRT Some more unusual symptoms include tingling in the ears, dizziness, painful leg cramps and a bloated feeling.
Emotional disturbances
Psychological disturbances which many menopausal women commonly complain of are depression, insomnia, panic attacks, mood swings, irritability and lack of self-confidence. These feelings often appear before the symptoms of hot flushes. Short-term memory loss is also complained about but this may be more age related because it also affects men.
Although HT relieves these symptoms for many women, there is no conclusive proof that these symptoms are the direct result of oestrogen withdrawal. Many women seek to blame oestrogen withdrawal when their real problems may be stress related at home or work. At this time of life, women are prone to fretting about their changing body shape, weight gain, sagging breasts, wrinkles around the eyes, career unfulfillment, problem children and a disappointing marriage. Emotional symptoms from the time of menopause are very difficult to classic and may be unrelated to lack of oestrogen.
With our present state of knowledge, we are unable to explain how and why HRT can give many of these women relief from their emotional symptoms. Some of this improvement may be the result of the tranquility they achieve from HRT’s correction of their hot flushes. However, there is an equal number of women who pass through menopause without any emotional trauma.
Premenstrual syndrome (PMT) is a group of symptoms which affects women in their third and fourth decade, ultimately merging with perimenopausal symptoms. It is a stressful combination of physical and psychological symptoms which occurs regularly before the start of menstruation. Symptoms can include headaches, irritability, depression, mood swings, menstrual migraine and suicidal tendencies. There can also be poor performance, clumsiness, changes in weight, tender breasts and fluid retention. The exact cause of PMT is not known.
Personal story
Persistent headaches which, in reality, were hot flushes
Joan, a hotel chef, who had a hysterectomy and removal of both ovaries at 36 because of severe infection from the Dalkon Shield complained to her doctor of headaches. Six months after her operation she began to suffer persistent headaches which were actually hot flushes. Various doctors considered the condition to be persistent headaches which were not relieved by pain killers. She was referred to a dentist who believed the malalignment of her jaw was causing the persistent pain.
Finally, she started taking HRT and within two weeks felt better.
Personal story - Hot flashes, insomnia and lack of concentration
Janet, 51, an architect, was worried about her mood swings, difficulty in concentrating, lack of sleep and unpredictable hot flushes. Her menstrual cycle, for the past 18 months, had become irregular and her last. menstrual period was four months ago. Her past medical history was unremarkable except that she had had varicose veins surgically removed from both legs.
She had not taken any medication in the past. Her father died of coronary heart disease at the age of 56 after several years of suffering from angina which had also afflicted her mother. Her menopausal status was suspected from her irregular menstrual cycle and symptoms and was confirmed with an elevated FSH level by her blood test. HRT was recommended to control her symptoms and to prevent her from developing heart disease because of her family history which put her in a high risk category
Key points
1.     After menopause the oestrogen levels progressively decline, causing several permanent changes. Menopause is not a transitory phase, but a permanent one in your life because the oestrogen deficiency is permanent.
2.     Symptoms of menopause are many and varied, extending from psychological to physical manifestations. The commonest are hot flushes, irregular bleeding, vaginal dryness and mood swings. Menopausal symptoms are not a universal experience for women.
3.     Symptoms can start many years before and continue many years after your last menstrual period. If you are experiencing any of these symptoms, it is wise to discuss them with your doctor, particularly one with a special interest in menopause
4.     There’s no conclusive evidence to suggest that menopause causes any psychological problems. Many women claim that HRT helps their mood changes, energy levels and memory
5.     The health of a woman’s skin is linked with her overall oestrogen supply, in a similar way to that of her bones.
6.     These symptoms can occur for many reasons. All possible causes should be looked for, and excluded, before HRT is started.
7.     HRT 15 the focus of the effective treatment of menopause. However, about 15% of women do not require therapy because they are still capable of making some oestrogen. 

Wednesday, September 17, 2014

KNOWING YOUR BODY AND HOW IT WORKS

For a good understanding of menopause, it is important to know something of the workings of the human female body.
Essential female organs
 Anatomically the female internal genitalia lie in the pelvic cavity on the pelvic floor. The pelvic floor is the lower part of the female body surrounded by two bones, one on either side, called the pelvic bones. These bones are covered by muscles, fascia and skin, like a thick curtain separating the inside organs from the outside world. These tissues make up the pelvic floor.
 In front of the uterus lies the urinary bladder. The bladder tube, called the urethra, opens in front of the vagina. Behind the uterus lies the last part of the bowel called the rectum. Its outside opening, the anus, lies behind the vaginal opening. The uterus is kept in place by many sheet like tissues called ligaments which are attached to the pelvic bones like ropes securing a tent to its pegs. Childbirth weakens the pelvic floor and contributes to prolapse (falling down) of the pelvic organs: the bladder, uterus and rectum. 
The ovaries and the Fallopian tubes
 The ovaries are greyish yellow in colour and solid, generally the size of a hazelnut but with variation depending on their dynamic state. 
 Externally, the genital organs are the opening of the vagina and the surrounding folds of skin. The vagina is protected by a perforated membrane called the hymen. The vaginal opening is surrounded by two little folds of skin called the labia minora. Where these folds join is a small cylindrical projection called the clitoris. Richly supplied with blood vessels and nerves, the clitoris is subject to arousal. The labia minora are surrounded by two further folds of skin on either side called the labia majora. Like the labia minora, they become thin (atrophic) with age because of the declining oestrogen supply.
The Bartholins glands, one on each side of the opening of the vagina, secrete fluids during sexual activity which further helps to lubricate the vaginal area.
Endocrine glands and hormones
Most bodily functions are controlled by natural chemicals — hundreds of them. One group of chemicals, called hormones, is secreted by specialised glands, the endocrines. These hormones are carried to distant organs via the blood stream where they exert their effect. They influence activities such as the regulation of body temperature, metabolism, repair, growth and reproduction. A proper balance of hormones is important in maintaining our mental and physical wellbeing. Significant or prolonged disturbances in this finely-tuned hormone balance may result in endocrine disorders such as diabetes or goiter. Many medical experts feel that menopause is also an endocrine disorder since the oestrogen deficiency that occurs after menopause differs so markedly from the premenopausal state. Others argue that the loss of oestrogen production after menopause is a natural part of the ageing process.
            In the human body there are seven main endocrine glands and many hormones. Located deep in the brain is the region called the hypothalamus which influences functions such as body temperature control, the wake- and—sleep cycle, blood pressure, water balance, sweat secretion and sexual behavior. It also produces hormones which control the activity of another endocrine gland called the pituitary gland situated nearby. The pituitary in turn influences the activities of other endocrine glands including the thyroid, adrenals and the ovaries. For this reason the pituitary is often called the master gland.
            The thyroid gland is located in the neck. It is responsible for maintaining many aspects of the body’s metabolism or chemistry; it is the energy control mechanism. This gland can become over- or under- active causing women to be over—active or slow and tired. These disorders often occur at the time of menopause.
            Embedded in the thyroid gland are four parathyroid glands which help to maintain proper blood levels of calcium, and therefore play a role in the maintenance of bone calcium and bone density. The cells responsible for secretion of insulin which controls blood sugar levels are located in the pancreas and are called the Islets of Langerhans.
Lack of insulin causes diabetes. Menopause is sometimes said to be analogous to diabetes, since the lack of oestrogen and lack of insulin both adversely affect, many parts of our body.
            There are two adrenal glands, one located on the top of each kidney. They secrete several hormones which influence salt and fluid balance, blood pressure, skin pigmentation and the body’s response to stress. Small amounts of male sex hormones, androgens, are also produced in the adrenals of men and women. These can be converted to oestrogens in the body fat of women, and represent the main source of oestrogens in women after menopause.The main hormones involved in menopause are called sex hormones, and are secreted by specialised endocrines called sex glands: ovaries in women and testes in men.
The ovaries
            Women have two ovaries. If one is not working, the other can carry out the complete function of both. This amazing organ lies dormant until puberty at which time it becomes constantly active creating regular monthly cycles extending over thirty to forty years. This activity finally comes to an end at menopause.
            The ovaries’ function is to facilitate and maintain pregnancy, and they do so by secreting oestrogens and progesterone. This function is realised through the complex menstrual cycle which is also influenced by hormones from the hypothalamus and the pituitary gland. Ovaries also secrete small amounts of the male hormones, androgens.
Each ovary consists of two layers, the outer cortex and the inner medulla. The outer-most layer of the cortex forms a covering which has a supporting mesh called the stroma. In the stroma, along with blood vessels and nerves, are scattered immature eggs called primordial follicles. In the developing foetus, the first sign of ovarian formation appears around six to eight weeks after conception. At this time, millions of primordial follicles are stored in the fetal ovary. By twenty weeks of foetal life there are seven to ten million primordial follicles which are rapidly reduced to two million at birth and then slowly reduced to three to four hundred thousand at puberty. Some forty years later only a few hundred follicles are left, and these are incapable of maturation or hormone secretion.
Menopause means no more egg maturation and therefore very little oestrogen
Age
20 weeks of foetal life                     20million primordial follicles (egg buds)
At birth                                            2 million primordial follicles
At puberty                                        500 thousand primordial follicles
Menopause                                       Few or no primordial follicles
            Despite decades of medical research some aspects of ovarian function still remain a mystery. We are unable to say what triggers ovarian activity at puberty. It is also uncertain what starts the menarche (the first menstruation) and what causes the abrupt end of egg maturation and menstrual cycling. It is believed that until puberty there is a suppression of the hypothalamic hormone called gonadotropin-releasing hormone (GnRH). GIIRH stimulates the pituitary to produces its hormones — follicle stimulating hormone (FSH) and luteinizing hormone (LH). These hormones ultimately cause the egg maturation and ovulation (the release of the mature egg from the ovarian follicle)
 As the prepubertal suppression of GnRH production is eased, FSH and LH are produced, leading to the first menstrual cycle. Slowly the functioning of the hypothalamus, pituitary and ovary becomes more integrated and regular menstrual cycles result.
The menstrual cycle
 Menstruation typically starts between the ages of ten and fifteen. Impulses in the form of hormones (GnRH) from the hypothalamus stimulate the pituitary gland to produce FSH. Under the influence of FSH, several primordial follicles start maturing but only one becomes the dominant follicle (or egg) for that cycle. The oestrogen produced by the egg stimulates a surge in the production luteilising hormone by the pituitary gland and this causes ovulation. The surge of LH causes ovulation in the middle of the cycle about fourteen days after the follicle starts growing. After the egg is released the remaining cells of the empty follicle form called corpus luteum. (Latin for yellow bodied) which then produces the second female hormone, progesterone in the menstrual cycle. In the first two weeks of the menstrual cycle leading up to ovulation estrogens help the growth of the lining of the uterus( The Endometrium). 
In the first two weeks of the menstrual cycle, leading up to ovulation, the oestrogens help the growth of the lining of the womb (the endometrium). In the second two weeks, the progesterone matures or ripens this lining.
If conception occurs, nutrition and support is provided by this lining for the growing embryo. Progesterone levels remain elevated, ensuring the stability of the womb lining, and enabling the pregnancy to continue. However, if fertilisation does not occur, an abrupt fall in oestrogen and progesterone levels takes place about 10—12 days after ovulation.
 This drop in hormone levels destabilises the lining of the womb, which is then shed as menstrual flow indicating the end of the ovarian cycle. Regular
menstruation is a reassuring visual sign that the ovarian function is normal. A new cycle of egg maturation begins.
At the time of menstruation other specific chemicals called prostaglandins are produced in the endometrium which may be responsible for period cramps, headaches, nausea and dizziness accompany a menstrual period
Regular menstrual cycles continue for thirty to forty years, the reproductive years of a woman’s life. During these years, a woman can menstruate 400—500 times. The only time when the lack of a period is normal is during pregnancy and lactation. Otherwise the absence of a period may indicate disturbances of the ovarian function.
By the age of 40 to 45 years, most of the primordial follicles are used up. There is erratic maturation of the remaining follicles and often irregular menstruation. This irregularity is usually accompanied by an overall decrease of oestrogen levels. When the oestrogen level is low the pituitary gland receives an impulse to secrete increasing quantities of FSH. This is an attempt to stimulate the remaining follicles, which are usually less responsive and fail to mature, and hence fail to produce oestrogen or progesterone.
Occasionally, ovulation can occur during these years of irregular menstrual cycles prior to menopause. However, when all the follicles are exhausted, or any that remain do not mature despite increasing amounts of FSH from the pituitary, the ovarian cycle and menstruation cease. The complete cessation of the menstrual cycle announces the onset of menopause.
 Menopause is therefore correctly dated only in retrospect by the absence of any further period. The age when it usually happens is around 50 years although there are racial, genetic and socioeconomic variations to this mean age. During the period of irregular menstrual cycles prior to menopause the blood FSH level may be high but the LH level can be normal. Women are still at risk of conceiving, although the risk is small. It is only after blood levels of FSH are shown to be consistently high that pregnancy cannot take place, and true menopausal status is confirmed.

Oestrogens
There are three main types of oestrogens — oestradiol, oestrone and oestriol.  Oestradiol is the most potent of the oestrogens. Oestrogens are mainly produced by the maturing egg follicles. In the prepubertal years, small quantities of oestrogens are produced from the ovaries before regular menstruation is established. Some of the oestrogens are derived from the conversion of androgens (secreted by the ovaries and adrenals) to oestrogens. This conversion takes place in body fat
Besides their role in reproduction, oestrogens perform several other important functions. During puberty, they help the growth of the sexual organs: the breasts, uterus, fallopian tubes, vagina and vulva. The child’s figure changes to a female figure with increased fat deposition and bone mass. Oestrogens are responsible for the distinctive female body shape because they regulate the specific distribution of the body’s fat in the hips, abdomen and upper arms. The development of under-arm and pubic hair is due to an increase in androgens from the adrenals and the ovaries. Subsequently ovulation starts and women begin their reproductive life. During a normal menstrual cycle, the oestrogen level varies from being very low just before and on the first day of menstruation, after which it starts to increase as the new follicle matures
Oestrogens help the development and maintenance of bone mass and the body’s other structural tissues such as collagen. The wellbeing of the cardiovascular system appears to be enhanced by an adequate supply of oestrogen which helps to protect women from coronary artery disease.
Progesterone
Progesterone is produced by the corpus luteum of the ovary in the second half of the menstrual cycle. It plays an important role in reproduction, and is essential for the maintenance of a pregnancy. Its main functions include the maturation of the lining of the uterus, the thickening of the cervical secretions, maturation of the cells of the vaginal lining and the relaxation of the body muscles in general. It helps the glandular development in the breasts. It can cause a slight rise in body temperature, fluid retention, acne and mood swings. These signs indicate that ovulation has taken place.Recent evidence also suggests that progesterone helps in the maintenance of bone mass and in the prevention of osteoporosis.
Androgens
Androgens (androstenedione and testosterone) are derived from the adrenal glands and ovaries. They are mainly responsible for muscular development, growth of body hair, sense of wellbeing and play a part in sexual desire. At menopause, androgens are converted to oestrogens in body fat. This conversion supplies some oestrogen to women after menopause although in a much decreased amount. Nonetheless, the presence of oestrogen from this source prevents many postmenopausal women from experiencing effects of menopause such as hot flashes, emotional disturbances and atrophy of the genital organs including the breasts. Obese women are less likely to suffer some effects of menopause as their larger supply of body fat can help in maintaining reasonable levels of oestrogens by this conversion. Of course, obesity brings with it other problems, including irregular bleeding, endometrial thickening and increased risk of cancer of the uterus.
Because of a relative excess of androgens, which are male hormones, facial hair may appear for the first time after menopause. As years go by, the acute symptoms of oestrogen-deflciency such as hot flashes abate, but the long-term effects of oestrogen deprivation such as osteoporosis, thinning and shrinking of the genital organs and adverse effects on the cardiovascular system become more significant. According to the National Heart Foundation, heart disease is the leading cause of death for Australian women, representing 24.6% of all deaths. Fifty per cent of all postmenopausal women die of heart disease.Eventually, the ovary is exhausted and does not produce even enough androgens to be converted to oestrogens. The contribution made by the adrenal gland proves inadequate; consequently the effects of oestrogen deficiency become more and more severe.

Changes to expect around and after menopause           
The ovary at menopause shrinks to the size of an almond. Opinions differ about the number of remaining follicles at this stage: from a few hundred to none. The follicles do not respond to increasing quantities of FSH. Small amounts of oestradiol may still be produced, but this is about one tenth of the amount produced during the menstrual cycle. The ovarian stroma increases its secretion of androgens due to the stimulation from increased FSH levels. Some of these androgens are converted to oestrogens in menopausal women. These oestrogens (predominantly oestrone) are not as potent as the oestradiol secreted by the maturing follicles.
 The pituitary produces increasing amounts of FSH and LH — up to five times more than during the reproductive years. After a certain point, there is no further increase. Androgen levels may be relatively high compared with oestrogen levels. The total cholesterol level in the blood is increased and the ratio of low—density (‘bad’) cholesterol to high—density (‘good’) cholesterol increases, raising the risk of heart disease. There is also new evidence that the absence of oestrogen adversely affects the tone of the arterial walls.
Calcium balance is also adversely affected, causing thinning of the bones and osteoporosis. Consequently the risk of fractures increases. The breasts may change in size. In some women, the size increases from fat deposition. Such fat deposition takes places in other parts of the body particularly the abdomen, hips and arms which then causes a change in body shape and weight distribution. Meanwhile, the uterus decreases in size and the lining thins out. The cervical secretion decreases. The vagina becomes thinner and smaller. It loses its elasticity, lubrication and acidity. During the reproductive years, the acidity of vaginal secretions helps prevent vaginal infections.
The external genitalia (the vulva) undergoes thinning. However the pad of fat on top of the pubic bone called the mons pubis often gets thicker from fat deposition. Pubic hair becomes sparse. Sexual desire in some women increases due to high androgen levels, while in others, it decreases as a result of pain during sexual intercourse, caused by a dry vagina.
Key points
1.     The ovary, the female sex gland, is the main organ concerned with menstruation, reproduction, production of the female hormones cestrogen and progesterone, and menopause.
2.     The ovary lies dormant from birth to puberty and becomes dormant again at menopause, after four decades of reproductive activity.
3.     It is now being researched what biological catalysts activate, and then end, ovarian activity. Further to this key point, in 1990 a neuron called kisspeptin was discovered in Hershey(Pennsylvania) it is named after the Hershey’s Kisses (Chocolate Bars), so that everybody will know where it was discovered. In the last ten years lots of research has been done on Kisspeptin and it has been concluded that Kisspeptin neurons joined to GPR54 are singularly essential to initiate gonardotrophrin secretion at puberty. They are essential at the start of puberty but they do not control when the puberty starts. Originally this gene was responsible for the suppression of the spread of melanoma in breast cancer. It is now a very useful tool in the management of infertility and IVF.
4.     Oestrogens play the key role in maintaining a woman’s health during the reproductive years. The lack of oestrogens may cause complex physical and emotional problems often associated with the menopausal years.

Wednesday, August 20, 2014

MENOPAUSE CONTINUED

By 1940 the medicalization of menopause became popular, they prepared drugs from the urine of pregnant women and pregnant female horse's(Premarin). These drugs were available in the USA in high doses such as 1.25mgs.


Further down the track by 1948 smaller doses were available such as 0.625 mgs and 0.3 mgs.
In 1950 Ayrest Laboratories funded a big campaign to educate women on menopause, what it is and how it can be helped. After their public relations exercise's, Premarin become the number one drug dispensed in the USA.


This got further promotion when gynaecologist Dr Robert Wilson in 1964 published an article on menopause called" Menopause" and a book called" Feminine Forever".
He did very extensive PR on the value of HRT, however by 1968 the side effects of oestrogen replacement therapy started to become obvious, such as endometrial cancer, breast cancer, deep venous thrombosis and the lack of any benefit to heart disease. There were some benefits, such as the prevention of osteoporosis and fractures.
Because of these complications several studies were set up to assess the benefit risk ratio of HRT(Oestrogen and Progesterone).


The main study was set up by the national institute of health , called Women's Health Initiative(WHI).
This was started in 1991 and to be completed in ten years on 160,000 women.
There were four arms to this study , one of them was a continuous oestrogen progesterone with an intact uterus, however this had to be stopped after 7 years due to increased risk of breast cancer , heart attacks and deep venous thrombosis.
This group had women of all ages from early menopause to late. They were more useful in younger women who took the HRT at the start of menopause.


The conclusion drawn from these controlled trials there was clear evidence of deep venous thrombosis, there was no clear benefit of cardiac disease and there was no increase in coronary disease in women less than 10 years post menopausal.


After this study and many others the oestrogen was on trial and it seemed that the benefits of oestrogen were less beneficial than the side effects, this created a fear amongst women particularly the increased risk of breast cancer.
All of a sudden the sale of HRT plummeted , the stock market fell by nearly 20% and the sale of drugs from Wyeth namely Premarin fell from 1.2Billion to 984.Million.
People started to believe that these tablets were no more the magic bullet.
One of the problems with this study was that they included women of all ages and even those who had no symptoms.
As a result of this fear, millions of women suffered from severe hot flashes and problems with their sexual life. Their husbands also suffered during this period from their wives' mood swings, bad temperament and were devoid of any sexual pleasure with each other.
We have recently worked out that Pre menopause, Peri menopause and Menopause is a continuum of the same biological problem, which is the lack of oestrogen due to the end of the biological cycle for women. This is now referred as Peri-Menopause, Menopause and Post Menopause. This has been studied under stages of reproductive aging, this makes it easier to understand women's menopause.
This period lasts for several years and that's why is was called "Climacteric". This in Greek meant seven years.
Currently we call it Menopause transition.


During this time some women have variable menstrual cycle both in duration and amount of bleeding, some of them still ovulate and can get pregnant. One of the hormones called F.S.H which comes from the brain increases. Please refer to earlier posts in relation to menstrual cycle.
Later on in menopause transition the menstrual cycles are delayed up to sixty days or more, F.S.H increases further. Its called menopause when you have not had a period for one year.


During this time of menopause transition women suffer symptoms of menopause, such as hot flashes, lack of sleep, mood swings, irregular bleeding and many others.
During this time we need to treat them and also offer contraception.
Recently the Women's Health Initiative has published a new update on women's health along with the British Menopause Society , North American Advisory Committee and Royal College of Gynaecology have all published new guidelines on HRT, so we have come full circle.
WE should not let women suffer from any fear from menopause or HRT, always consult a professional and not be guided by the media frenzy about this subject.


The original WHI created a lot of confusion, the reasons being the selection of women for the study was incorrect. 160,000 women were selected with no consideration of their age, their symptoms, their medical history, obesity, smoking, and poor lifestyle factors. They mainly focused on the long term benefits of HRT, no attention was paid to their initial symptoms such as severe hot flashes, urinary symptoms, lack of sleep, mood swings, and many other annoying problems.


The results were also analysed and expressed very poorly , for example they said that breast cancer risk increased by 26 per cent( 30-10,000 to 38-10,000 ), this frightened the life out of women and their care providers, they could have easily said, one extra patient in 1250 women who had been on HRT for 5 years was at risk.
The next worst thing was that these results were given to the media before they were published in any medical journal and analysed by the experts.
Many experts felt that the WHI conclusions needed a complete reassessment.
It is after ten years of muddy conclusions and many research trials the cloud over HRT has cleared.
We cannot say that HRT has no side effects , but the benefit risk ratio is in favour of the benefits.


The most important thing is to remove the fear in the mind of women and their care providers, the next important thing is the timing of HRT, the sooner it is started near menopause or menopause transition the better it is.
If we start after women are over 60 or ten years after menopause, the aging effects have already influenced their bodies.
HRT should not be offered for prevention of chronic disease except for osteoporosis, it is useful in women before the age of 60 who have the risk of osteoporosis.
This fear of HRT has been fuelled by an aggressive alternative medicine industry, the media, some non clinical groups seeking publicity for funding and the Therapeutic Goods Association has not revised the inaccurate conclusions of the WHI.


In general the conclusions on HRT are:
1- Do not let the women suffer who need HRT for their symptoms.
2- Can be an appropriate treatment for women with osteopenia, or osteoporosis.
3- Local oestrogen therapy is very useful with women who have a dry vagina and associated poor sexual life, and in fact it puts the smile back on their faces, and they can enjoy sexual pleasures for further years.
4- Women who have had a hysterectomy only need oestrogen alone and this has no increased risk of breast cancer.
5- In women who have a premature menopause, HRT is very essential until at least the normal age of menopause.
6- The recent trials suggest that the lowest dose of oestrogen should be used.
7- It is useful to use transdermal oestrogen( on the skin )  as it prevents vascular complications, eg: Deep venous Thrombosis.
8- The dose and duration of HRT and safety issues should be discussed in individual circumstances.
9- The use of custom-compounded bio identical hormone therapy is not recommended.
10-Current safety data do not support the use of HRT after breast cancer. If you have to have it then you need to have a detailed consultation with your Oncologist.


The other things we will need to discuss about menopause are, Anatomy and Physiology of Menopause, Assessment of Menopausal Women and current treatments available.










Wednesday, July 23, 2014

MENOPAUSE? MENOPAUSE? MENOPAUSE?

The above subject" Menopause" is going to be covered in a number of posts in the coming weeks. I hope you enjoy and learn something useful from them.


Part One:-


What is it? There is even a musical on menopause and I hope some of you have seen it and enjoyed it. I often wonder along with other scientific people is it a disease or just a phase in a woman's life. Woman's sex gland the ovary which you may have read in previous posts is quite magical, and it changes the face of our lives. We are like little girls, then as we grow we become pubertal, menstruation starts, we become fertile and a few years later fertility is taken away from us and even the periods disappear, and then we are called menopausal. The time before the period stops has varying activity in our body and it is called pre, peri, post menopausal. It generally takes up to seven years for us to stop the periods completely. In the past this referred to Climacteric (A Greek word meaning seven).
It is called menopause when we have no periods for twelve months after the last period.
Each women's experience is unique in their own way during this time, hence the diagnosis is difficult to make.


Menopause has suddenly become like an epidemic, but this is probably due to our increased life expectancy and our desire to be healthy and happy during our menopausal years.
In 1900 the average life expectancy of a woman was 50 years, which is a very short life span after menopause, as Aristotle estimated the age of menopause was 40 years, so we had hardly any years left to live after menopause, however now in the world, several million women join the menopause club each year.
According to the World Health Statistics a girl born in 2014 is expected to live for an average of 73 years. Japanese women live the longest. The divide between the rich and the poor countries is still there, and in the rich countries the women live 7 years longer, and this is because they have the access to all the modern medical facilities that the women in the poorer countries do not have.
Therefore it is not surprising that wherever you go, be it a luncheon, a dinner party, a function or any gathering, middle aged women in their forties discuss menopause, what is it,can it be prevented, what we need to do about it, what is the treatment for it, medical or natural.


A few years ago I went home to India where my mother's cook said to me "That she needs treatment for malaria, as she gets high temperature , and sweating, the treatment for malaria that the doctors are using is not helping me". Obviously she was menopausal having hot flashes and sweating which is the most common and distressing symptom of menopause. The modern treatment of  HRT fixed her.


The attention paid to menopause is not new, as it started to be looked at in the 1930's by a French doctor who wrote one of the first books on menopause and he called it "The Problem as Menopause".
They called it the deficiency disease and they started to give extract of crushed ovaries and an extract from the amniotic fluid of cattle.
They also gave testicular extract and a product called Emmerin was prepared from pregnant women's urine and this was found to be useful.
In 1930 a German scientist Dr Zondek prepared an extract from the urine of a pregnant mare which was much cheaper than Emmerin and so it continued to be used.


Synthetic oestrogen was developed in 1938 and progesterone in 1937 and thus medicalization of menopause started.






 

Wednesday, May 7, 2014

GESTATIONAL DIABETES MANAGEMENT GUIDELINES

In general terms gestational diabetes includes Type 1, Type 2 and Diabetes diagnosed for the first time during pregnancy. In further discussion we will focus mainly on GDM.
When women with type 1 and Type 2 want to get pregnant it is very important that their management starts pre-conception, and if by chance that this has been missed they require very vigilant pregnant management.
There is a higher risk of early pregnancy loss in diabetes therefore it is important to make sure their pregnancy is well controlled, it is good to have their weight controlled, with body mass index being between 25 and 28 (Weight divided by your height squared in meters).
It is also important to start on Folic acid .5mgm daily as it protects against neural tube defects(defects within the brain and spinal cord), confirmation of the diagnosis should be done by 75 grams oral test and described in our previous post. Around 28 weeks of pregnancy.
Patient education is very important and they should be taught what diabetes is and how to take care of it themselves.
This includes dietary therapy, exercise, and maintenance of their blood sugars.
There is some controversy among the medical fraternity as to the level of glucose. In Australia it has been confirmed that the fasting level of 5.3 mmol/L and two hour post meals maintain at 7. If this was done the results of pregnancy are very satisfactory. This means that the pregnancy can be carried full term and the delivery be normal as the baby will not be too big.

During the antepartum management a fetal surveillance is also essential, this will again help the pregnancy to be carried to term. Ultrasound for fetal well being and fetal heart monitoring on a weekly basis help to make sure that the baby is doing well and fetal weight can be assessed.
This is usually started around 32 to 34 weeks of pregnancy.
The main complications of diabetes during pregnancy are, increased risk of miscarriage, high blood pressure, toxemia of pregnancy and large babies more than 4.5 kilograms or more in weight.
This leads to difficult delivery and can cause trauma to the baby, stuck shoulder, injury to the nerves causing palsy, the most common of these is called Erbs Palsy, fractures to the babies bones, neonatal asphyxia, neonatal hypoglycemia and even still birth.
Sometimes the baby can be small due to growth retardation, this can be due to high blood pressure and this has its own problems.
Pregnancy with diabetes should always be managed by a group of professionals, including obstetrician, endocrinologist interested in pregnancy, diabetic advisers, pediatrician and other specialists as required, for example renal physician and ophthalmologist.
Renal and eye diseases can become more complicated during pregnancy if there due to diabetes.

Coming back to the management of gestational diabetes:
1 - Routine testing on all pregnant women is universally accepted in Australia
2 - Try and control GDM by altering the lifestyle factors with the help of a diabetic adviser, dietitian and physio therapy. The diabetic adviser helps them to learn how to test their blood sugars and administer insulin if required.
3 - They can continue on their oral diabeteic treatment such as metformin.
4 - In a small number of cases, about 40% need insulin. the insulin therapy is usually controlled by the endocrinologist, they usually use several doses of rapid acting insulin.
5 - If there are no other problems the delivery can be at term. It is best to induce so that the diabetes can be controlled during labour. Continuous fetal heart monitoring is done during labour. A caesarian section is performed when ever required the baby is distressed or the baby appears to be too big for the pelvis.
6 - At birth the baby is looked after by the pediatrician who monitors the baby's blood sugars are less than 2mmol/L. They are treated with intravenous glucose.
7 - The mothers with GDM do not require any treatment after 24 hours of delivery.

Impaired glucose tolerance test merits careful follow up, this includes a OGTT at 6 weeks and at least once a year. In some non European countries the incidence of diabetes can be as high as 62 percent once they were found to have GDM.
As mentioned in the earlier post , the offspring of these mothers are likely to develop chronic illnesses such as diabetes, heart disease and strokes.

One of the key points  GDM has adverse affects for pregnancy outcome and long term problems to the women and children, it is debated that due to the high prevalence of GDM the universal testing is important, and the management of GDM improves maternal and fetal outcomes. The women with GDM should be tested every 12 months. The increased number of women with GDM (almost double normal) has implication for resource allocation. The other areas where research is required is the universal screening , what is the optimal criteria for diagnosis of GDM , the cost benefit of team approach, the follow up programs for mothers and their babies and are there any possible prevention of the spreading of diabetes in these mothers and their offspring.
  

  

Monday, April 28, 2014

GESTATIONAL DIABETES

In this post I am drifting from gynecological topics to a common obstetrical problem known as Gestational Diabetes Mellitus, (GDM). I am sure that you are all familiar with the diabetic epidemic going around the world. Twenty years ago there were 20 Million diabetics in the world and now there are 240 million and if we do nothing there will be 340 million diabetics within the next 20 years. Diabetes is a long term multiorgan disease,can you imagine so many sick people wandering around the world.
What is the cause of diabetes being so popular? It is our lifestyle factors like sugary drinks and bad take away food, no activity or exercise.

Recently a Doctor David Baker from University of South Hampton ,UK has postulated a theory that the imprints of chronic diseases such as heart disease, diabetes and stroke are laid in utero they are born with this imprint. These babies are usually small in weight and premature. They generally become fat by two years of age with the wrong type of nutrition.

This theory appears to me, that During World Wars 1 and 2 young women were neglected nutritionally and so now the baby boomers are suffering with these chronic diseases. Modern society has to pay more attention to nutrition and activity, to prevent the spread of these chronic diseases.

Now going back to diabetes there are several types of diabetes such Type1, Type2, Gestational Diabetes Mellitus and they happen for different reasons. A pregnant mother can have any of these.

Diabetes Mellitus usually means that our body is unable to maintain a healthy blood glucose level.
A hormone in the body called insulin helps to make a balance in our blood sugar. The blood sugar goes high if there is not enough insulin for the body's health or the body doesn't utilize this insulin properly.
The insulin is produced by cells called Beta Cells which are located in the pancreas. In Type 1 diabetes it usually happens in childhood the beta cells are destroyed so they do not have insulin. These individuals require artificial insulin to maintain there blood glucose throughout their life.
They need careful management and can live a normal life and women can have a safe pregnancy if looked after properly.
The other diabetes is called Type 2 which starts later on in life, but these days young adults are starting to get these problems due to obesity and lifestyle. The beta cells still secrete insulin but usually it may not be enough or the body becomes resistant to insulin, however young women suffering from Type 2 diabetes can be looked after during pregnancy by strict medical management before, after and during the pregnancy.
Some women who are quite normal before getting pregnant develop diabetes during pregnancy, this is addressed as Gestational Diabetes. During pregnancy hormonal changes can make you less responsive to insulin. The increasing levels of placental lactogens and oestregens interfere with insulin function.
This increases until 28 weeks of pregnancy and generally the need for insulin is at its highest.
Recent studies show that diagnosis or management of GDM is beneficial for the mother and the baby and the next generation.
There is still some controversy about this screening program, many countries including Australia do screening for all pregnant women during pregnancy, there is some conflict if this should only be done in high risk women and secondly at what stage that this should be done.

I feel that it is worthwhile doing a fasting glucose of all women at the initial visit with their other blood tests, and if it is more than 5.5 then they can have the full test for diabetes called oral glucose tolerance test.(OGTT)
Some people like to do a full OGTT in high risks groups and these are:
1- Age over 40 plus
2- Obesity BMI more than 35
3- Family history of diabetes mellitus or GDM
4- Women from some countries ie: India, China, South Asia and Pacific Islanders (In Nauru 1/3 of the population is diabetic)
5- Poor obstetric history eg: previous still birth, repeated miscarriages, previous GDM
6- Previous birth of a baby weighing 4.5 Kilograms or more
7- Other genetic factors
8- Polycystic Ovarian Syndrome
9- Any medications like Cortisone
10-Anyone who has given birth to more than 5 children

Although there is no international agreement as yet on screening for GDM universally, however in Australia this is done on every pregnant patient at 24-28 weeks. The patients at high risk are often investigated early.
Initially we did a glucose challenge test which involved one hour blood glucose level after seventy five grams of glucose solution and if one hour glucose was more than 10 a full OGTT was done.
This glucose challenge test is no longer carried out or required.

OGTT is done after the patient has been fasting for 10 hours, a fasting glucose is done and then the patient is given 75 grams of glucose and two further blood samples are taken at 1 hour and 2 hours.
There is some controversy about these blood levels as well;
1-The fasting should be more or same as 5.1mml/litre (Some labs take this figure up to 5.8)
2-One hour 10mml/litre (Some labs do not take this sample)
3-Two Hours 8.5mml/litre ( Some labs take it less than 7.9)

You have to take into consideration the area you live in, the ethnic groups and the laboratories practice.

The risk and management of GDM will be discussed in the next post.