The Ramblings of a Middle Aged Fertility Physician whose life revolves around Eggs, Sperms & Embryos....
Monday, November 19, 2007
Fibroids & Fertility
What are the effects of fibroids on fertility, and on the outcomes of assisted reproduction technology, and when is intervention warranted?
According to published estimates, about 30 percent of all women up to the age of 30 years, and half of all women of reproductive age, will develop fibroids. About half of affected women will be asymptomatic. Fibroids are estimated to be associated with infertility in 5-10 percent of women, and are possibly the sole cause of infertility in 2-3 percent. Because most women with fibroids are fertile (and many are asymptomatic), having fibroids does not necessarily mean that reproduction will be compromised. However, it is clear that fibroids could impair fertility and/or cause pregnancy loss, through various possible mechanisms.
These potential mechanisms, include:
-Distortion of the endometrial cavity, preventing or otherwise impeding sperm migration and reducing implantation rates.
-Reduced vascularity and possible discordant growth of endometrial tissue overlying an intramural fibroid, impairing implantation.
-Dysfunctional uterine contractility caused by submucous or intramural fibroids, affecting sperm migration, tubal contractility and embryo nidation.
-Changes in the endometrial cavity milieu, as a result of glandular atrophy or distortion, adenomyosis, separation of muscle fibers from the basal layer of the endometrium, secretion of vasoactive amines, and local inflammatory changes.
Whether or not fibroids affect fertility or the outcomes of assisted reproduction technology (ART) will typically depend on their number, location, and size of fibroids.There is a general consensus that submucous fibroids impede fertility, as well as being associated with miscarriage, and that the obvious benefits of hysteroscopic myomectomy, coupled with its low risks, suggest that the resection of submucous fibroids is warranted to enhance fertility in women with no other obvious cause of infertility or with recurrent pregnancy loss. There is increasing evidence that intramural fibroids may impair the outcomes of ART. Laparoscopic or conventional myomectomy should be carefully considered prior to ART in women with intramural fibroids “of considerable size” in whom other causes of subfertility have been eliminated. Subserosal fibroids, appear from published data to be unlikely to compromise fertility or cause miscarriage, although the number, location and size of the fibroids should be considered in treatment decisions.
Factors to be considered in formulating a plan of management in a subfertile woman with fibroids are an accurate estimation of the size, number and location of the fibroids, and whether or not the uterine cavity/anatomy is distorted. TVS [transvaginal sonography] and hysteroscopy can achieve a sensitivity and specificity of 100 percent in the evaluation of uterine cavity distortion. It is reasonable to consider a hysteroscopic myomectomy for submucosal fibroids in a subfertile woman as this entails relatively little morbidity compared with an open myomectomy. Open myomectomy should be considered where there are large subserosal/intramural fibroids and they are multiple (>5). Patients should be carefully counseled about the intra-operative risks, risks of recurrence of leiomyoma (15 percent), uterine rupture (1 percent), and increased likelihood of caesarean section (50 percent) in future pregnancies.
Sunday, November 18, 2007
Being a super-millionaire is a sure-fire recipe for unhappiness
I read this fascinating article on the web yesterday & thought it would be apt for our regular readers of Rotunda Ramblings. Non-medical article for a change, but opens up new vistas of thought. Enjoy the read & reflect!
Miserable? Bored? You must be rich
Helen Kirwan-Taylor
13 November 2007
For some people, flying first class represents the height of luxury. But not Prince Alwaleed bin Talal of Saudi Arabia, who has become the first person to buy an Airbus A380 superjumbo to use as a private jet. Given that the passenger version costs £145 million, the VIP edition – dubbed "The Flying Palace" – will surely cost a hefty chunk of change. Another, anonymous, billionaire spent £83 million on a flat in the Richard Rogers Partnership's new Hyde Park development – which was double the going rate.
Such excessive spending might not be a sign of conspicuous consumption but of addiction. "For the super-rich, houses, yachts, cars and planes are like new toys that they play with for five minutes and then lose interest in," says psychoanalyst Manfred Kets de Vries, one of the new breed of therapists treating the angst of the very rich. "Pretty soon, to attain the same buzz they have to spend more money. All the spending is a mad attempt to cover up boredom and depression."
According to de Vries, the super-rich are increasingly succumbing to what has been labelled Wealth Fatigue Syndrome (WFS). When money is available in near-limitless quantities, the victim sinks into a kind of inertia. Feeling any sort of excitement means taking more and more risks, financially and physically. Luxury holidays are replaced by abseiling in Australia and swimming with sharks. The first-class ticket of old becomes a private jet such as Prince Alwaleed's: Boeing has 11 standing orders for such wide-bodied "mobile mansions".
Frank James, the author of Richistan, a study of this new class, saw WFS up close. "The rich are never happy, no matter what they have," he told CNN. "There was this man who owned a 100ft yacht. I said: 'This is a terrific boat.' He said: 'Look down the harbour.' We looked down the marina, and there were boats two and three times as large. He said: 'My 100ft yacht today is like a dinghy compared to these other boats.' When else in history has someone been able to call a 100ft yacht a dinghy?"
The rich are no longer a tiny elite who hide behind electronic gates in Mayfair. There are half a million American households with assets of more than $10 million, and a study of 71 countries by Merrill Lynch and the consultancy firm Capgemini found that the fortunes of "high net worth individuals" increased by 11.4 per cent last year.
In Britain, the wealthiest self-made billionaires have trebled their fortunes over the past five years. But, as you draw up battle plans for surviving the credit crunch, spare a thought for the sufferers of WFS and how monumentally dull and isolating it is to live in a world where estates are traded like Pokémon cards. "A lot of my clients made money in commodities, and consequently everything – including houses and boats – is treated like shares," says Peter Grabham, a project manager for the rich and famous. "When the houses have outlived their purpose, they are sold." Gardens arrive on the back of trucks; art collections fill entire wings overnight, though the owners often can't recall the artists' actual names. I have seen 20-year-old cypress trees craned into gardens – and out again when the owner got bored with that year's fashionable look. One neighbour in Holland Park tore up her house, employing the most expensive interior designer in England. But after spending the better part of £2 million on refurbishment, she decided she was more a traditionalist than a minimalist, and tossed the contents into the skip outside.
A famous hedge fund manager spent the better part of £20 million building the most exquisite estate in Gloucestershire. As soon as he had thrown a few big parties to show it off, he sold it. "I need a new project," he muttered. Some of our friends have jumped from nice five-bedroom houses in South Kensington to gated mansions in St John's Wood, complete with hot and cold running staff. But many who join the super-rich find it hard to keep their old circles of support. Happiness studies have repeatedly shown that being marginally better off than your neighbours makes you feel good, but being a hundred times richer makes you feel worse. So either you change your friends or live with the envy of others. "When a relationship becomes unequal, it becomes difficult," explains Dr Brendan Burchell, a professor of economics and psychology at Cambridge University. "If you're out in a three-star restaurant, how do you split the bill when he is a super-millionaire? And if he has a driver and you consider a taxi a luxury, you stop having shared experiences."In the end, the super-rich become isolated – and the only way to find empathy is to surround themselves with people as rich as themselves."The poorer everyone else gets, relative to the rich, the more isolated the rich become," says Dr Burchell. "Soon you end up like the Russian oligarchs, needing bodyguards and electric gates outside your house."
The happiest nations, he says, are those where people feel most equal, even if that means being less wealthy. Pentecost, a tiny island in the South Pacific, has recently been voted the happiest place on earth. They don't have WFS – in fact, they don't have money; they use pigs' horns instead.In places such as Pentecost, people actually talk to each other – indeed, belonging to a community is one of the single most important prerequisites for happiness. But when you jet between the Scottish estate, the London mansion and the chalet in Aspen, there isn't much time to get to know the neighbours.
"One of the most common complaints among the super-rich is loneliness," says de Vries. "People stop calling them. They assume they're too busy, or they are simply too intimidated." Or they simply can't cut through the barricade of staff.
Families, too, can fall victim to WFS. As the men get richer, the wives are either tossed out in favour of a new model or become engaged in inane, busy-making activities. The post-nup is the new must-have among hedge funders.
"This world is full of gold-diggers, and rich men are highly suspicious," says de Vries. "Often, they develop a form of paranoia."Meanwhile, for the wives, shopping trips to Paris and Milan get tedious. "Super-rich wives are effectively unemployed, and have all the same mental issues as the real unemployed," says Jon Stokes, an organisational psychologist and executive coach with Stokes and Jolly.
Children are just as vulnerable. In America, upmarket brat camps offering psychological support for rich kids are now common. Suniya Luthar, a professor of psychology and education at the Teachers College of Columbia University, found that such children are just as prone to antisocial behaviour as those from inner cities.
One in five affluent American children also suffers from clinical depression. One of the reasons given was absent parents: "These kids just get sent from house to house on private jets with nannies and tutors on board," says a teacher who works for the very rich during the holidays. "No one engages with them who isn't staff."
According to de Vries, the only cure for the boredom and anxiety is to give something back. "These people need to return to small pleasures and to stop worrying about having bigger and better toys," he says. "It's not what you have but what you do that makes you ultimately happy."The problem, though, is that your day job becomes about staying rich. "All those people you employ, funds you have to manage and wealth advisers you have to meet must be exhausting," says Stokes.
And boring. And then there are the five new construction projects to visit. Choosing one set of curtains is a challenge: choosing them for 20 bedrooms would finish most of us off.
Bo Derek didn't suffer from Wealth Fatigue Syndrome. Her advice was simple: "Whoever said money can't buy happiness simply didn't know where to go shopping." Exactly. I find it hard to sympathise with those suffering from an excess of cash; in fact, I find it all too easy to picture myself in their designer shoes... I'd be chauffeur-driven in a Bentley Continental GT and tackle longer journeys in a private jet, launched from my own private runway. Then I'd buy a super-yacht, complete with gym, bars, cinemas, air-defence systems and submarine (for a quick getaway). I'd model mine on Roman Abramovich's £200 million Eclipse; currently under construction, it will be three times as long as Nelson's Column. If my iPod ran out of tunes once on board, I'd order a command performance from Rod Stewart for £500,000 or, for another £2.2 million, get in the Rolling Stones. I'd spread my wealth with some fractional shopping, the successor to timeshare, which involves a percentage share of ownership: £200,000 would buy me a one-sixteenth share of a Gulfstream jet (or 23 days' usage a year). Around £11,000 would get me a year's fractional ownership - 50 weekdays in winter or four three-day weekends in summer - in an Aston Martin Vantage Roadster. I'd spend the rest on fractional ownership of fine art, a racehorse, and two or three foreign properties - a villa in Tuscany, a serviced apartment in Milan and a little place in the Seychelles. For us non-billionaires, it's probably the closest to experiencing the terrible problems of being obnoxiously wealthy that we can get.
Miserable? Bored? You must be rich
Helen Kirwan-Taylor
13 November 2007
For some people, flying first class represents the height of luxury. But not Prince Alwaleed bin Talal of Saudi Arabia, who has become the first person to buy an Airbus A380 superjumbo to use as a private jet. Given that the passenger version costs £145 million, the VIP edition – dubbed "The Flying Palace" – will surely cost a hefty chunk of change. Another, anonymous, billionaire spent £83 million on a flat in the Richard Rogers Partnership's new Hyde Park development – which was double the going rate.
Such excessive spending might not be a sign of conspicuous consumption but of addiction. "For the super-rich, houses, yachts, cars and planes are like new toys that they play with for five minutes and then lose interest in," says psychoanalyst Manfred Kets de Vries, one of the new breed of therapists treating the angst of the very rich. "Pretty soon, to attain the same buzz they have to spend more money. All the spending is a mad attempt to cover up boredom and depression."
According to de Vries, the super-rich are increasingly succumbing to what has been labelled Wealth Fatigue Syndrome (WFS). When money is available in near-limitless quantities, the victim sinks into a kind of inertia. Feeling any sort of excitement means taking more and more risks, financially and physically. Luxury holidays are replaced by abseiling in Australia and swimming with sharks. The first-class ticket of old becomes a private jet such as Prince Alwaleed's: Boeing has 11 standing orders for such wide-bodied "mobile mansions".
Frank James, the author of Richistan, a study of this new class, saw WFS up close. "The rich are never happy, no matter what they have," he told CNN. "There was this man who owned a 100ft yacht. I said: 'This is a terrific boat.' He said: 'Look down the harbour.' We looked down the marina, and there were boats two and three times as large. He said: 'My 100ft yacht today is like a dinghy compared to these other boats.' When else in history has someone been able to call a 100ft yacht a dinghy?"
The rich are no longer a tiny elite who hide behind electronic gates in Mayfair. There are half a million American households with assets of more than $10 million, and a study of 71 countries by Merrill Lynch and the consultancy firm Capgemini found that the fortunes of "high net worth individuals" increased by 11.4 per cent last year.
In Britain, the wealthiest self-made billionaires have trebled their fortunes over the past five years. But, as you draw up battle plans for surviving the credit crunch, spare a thought for the sufferers of WFS and how monumentally dull and isolating it is to live in a world where estates are traded like Pokémon cards. "A lot of my clients made money in commodities, and consequently everything – including houses and boats – is treated like shares," says Peter Grabham, a project manager for the rich and famous. "When the houses have outlived their purpose, they are sold." Gardens arrive on the back of trucks; art collections fill entire wings overnight, though the owners often can't recall the artists' actual names. I have seen 20-year-old cypress trees craned into gardens – and out again when the owner got bored with that year's fashionable look. One neighbour in Holland Park tore up her house, employing the most expensive interior designer in England. But after spending the better part of £2 million on refurbishment, she decided she was more a traditionalist than a minimalist, and tossed the contents into the skip outside.
A famous hedge fund manager spent the better part of £20 million building the most exquisite estate in Gloucestershire. As soon as he had thrown a few big parties to show it off, he sold it. "I need a new project," he muttered. Some of our friends have jumped from nice five-bedroom houses in South Kensington to gated mansions in St John's Wood, complete with hot and cold running staff. But many who join the super-rich find it hard to keep their old circles of support. Happiness studies have repeatedly shown that being marginally better off than your neighbours makes you feel good, but being a hundred times richer makes you feel worse. So either you change your friends or live with the envy of others. "When a relationship becomes unequal, it becomes difficult," explains Dr Brendan Burchell, a professor of economics and psychology at Cambridge University. "If you're out in a three-star restaurant, how do you split the bill when he is a super-millionaire? And if he has a driver and you consider a taxi a luxury, you stop having shared experiences."In the end, the super-rich become isolated – and the only way to find empathy is to surround themselves with people as rich as themselves."The poorer everyone else gets, relative to the rich, the more isolated the rich become," says Dr Burchell. "Soon you end up like the Russian oligarchs, needing bodyguards and electric gates outside your house."
The happiest nations, he says, are those where people feel most equal, even if that means being less wealthy. Pentecost, a tiny island in the South Pacific, has recently been voted the happiest place on earth. They don't have WFS – in fact, they don't have money; they use pigs' horns instead.In places such as Pentecost, people actually talk to each other – indeed, belonging to a community is one of the single most important prerequisites for happiness. But when you jet between the Scottish estate, the London mansion and the chalet in Aspen, there isn't much time to get to know the neighbours.
"One of the most common complaints among the super-rich is loneliness," says de Vries. "People stop calling them. They assume they're too busy, or they are simply too intimidated." Or they simply can't cut through the barricade of staff.
Families, too, can fall victim to WFS. As the men get richer, the wives are either tossed out in favour of a new model or become engaged in inane, busy-making activities. The post-nup is the new must-have among hedge funders.
"This world is full of gold-diggers, and rich men are highly suspicious," says de Vries. "Often, they develop a form of paranoia."Meanwhile, for the wives, shopping trips to Paris and Milan get tedious. "Super-rich wives are effectively unemployed, and have all the same mental issues as the real unemployed," says Jon Stokes, an organisational psychologist and executive coach with Stokes and Jolly.
Children are just as vulnerable. In America, upmarket brat camps offering psychological support for rich kids are now common. Suniya Luthar, a professor of psychology and education at the Teachers College of Columbia University, found that such children are just as prone to antisocial behaviour as those from inner cities.
One in five affluent American children also suffers from clinical depression. One of the reasons given was absent parents: "These kids just get sent from house to house on private jets with nannies and tutors on board," says a teacher who works for the very rich during the holidays. "No one engages with them who isn't staff."
According to de Vries, the only cure for the boredom and anxiety is to give something back. "These people need to return to small pleasures and to stop worrying about having bigger and better toys," he says. "It's not what you have but what you do that makes you ultimately happy."The problem, though, is that your day job becomes about staying rich. "All those people you employ, funds you have to manage and wealth advisers you have to meet must be exhausting," says Stokes.
And boring. And then there are the five new construction projects to visit. Choosing one set of curtains is a challenge: choosing them for 20 bedrooms would finish most of us off.
Bo Derek didn't suffer from Wealth Fatigue Syndrome. Her advice was simple: "Whoever said money can't buy happiness simply didn't know where to go shopping." Exactly. I find it hard to sympathise with those suffering from an excess of cash; in fact, I find it all too easy to picture myself in their designer shoes... I'd be chauffeur-driven in a Bentley Continental GT and tackle longer journeys in a private jet, launched from my own private runway. Then I'd buy a super-yacht, complete with gym, bars, cinemas, air-defence systems and submarine (for a quick getaway). I'd model mine on Roman Abramovich's £200 million Eclipse; currently under construction, it will be three times as long as Nelson's Column. If my iPod ran out of tunes once on board, I'd order a command performance from Rod Stewart for £500,000 or, for another £2.2 million, get in the Rolling Stones. I'd spread my wealth with some fractional shopping, the successor to timeshare, which involves a percentage share of ownership: £200,000 would buy me a one-sixteenth share of a Gulfstream jet (or 23 days' usage a year). Around £11,000 would get me a year's fractional ownership - 50 weekdays in winter or four three-day weekends in summer - in an Aston Martin Vantage Roadster. I'd spend the rest on fractional ownership of fine art, a racehorse, and two or three foreign properties - a villa in Tuscany, a serviced apartment in Milan and a little place in the Seychelles. For us non-billionaires, it's probably the closest to experiencing the terrible problems of being obnoxiously wealthy that we can get.
Saturday, November 17, 2007
Friday, November 16, 2007
Obesity & Infertility
The British Fertility Society has issued new guidelines for the treatment of women with fertility problems that help doctors address the impact of obesity.
"Obesity reduces the chances that a woman will conceive naturally and decreases the possibility that fertility treatment will be successful," said Tony Rutherford, Chair of the BFS's Policy and Practice Committee.
The new guidelines recommend that clinicians inform their patients about the negative effects of extra weight on the chances of conceiving naturally. They also suggest that clinicians defer the provision of fertility treatment to women whose body mass index (BMI) is greater than 35 kg/m2.
Women younger than 37 years should be encouraged to reduce their BMI to less than 30 kg/m2 to maximize the effectiveness of fertility treatment and to reduce the associated risks associated with fertility treatment, the guidelines state.
They add that women should be assisted in this, with the provision of psychologic support, dietary advice, exercise classes and, where appropriate, weight-reducing agents or bariatric surgery.
"The BFS has produced these new guidelines to help doctors provide safer and more effective fertility treatment for women," said Rutherford.
"We want to work with our patients to improve their chances of becoming pregnant with minimum risk to their health and that of their child."
"Obesity reduces the chances that a woman will conceive naturally and decreases the possibility that fertility treatment will be successful," said Tony Rutherford, Chair of the BFS's Policy and Practice Committee.
The new guidelines recommend that clinicians inform their patients about the negative effects of extra weight on the chances of conceiving naturally. They also suggest that clinicians defer the provision of fertility treatment to women whose body mass index (BMI) is greater than 35 kg/m2.
Women younger than 37 years should be encouraged to reduce their BMI to less than 30 kg/m2 to maximize the effectiveness of fertility treatment and to reduce the associated risks associated with fertility treatment, the guidelines state.
They add that women should be assisted in this, with the provision of psychologic support, dietary advice, exercise classes and, where appropriate, weight-reducing agents or bariatric surgery.
"The BFS has produced these new guidelines to help doctors provide safer and more effective fertility treatment for women," said Rutherford.
"We want to work with our patients to improve their chances of becoming pregnant with minimum risk to their health and that of their child."
Thursday, November 15, 2007
Human chorionic gonadotropin
Human chorionic gonadotropin (hCG) is a peptide hormone produced in pregnancy, that is made by the embryo soon after conception and later by the syncytiotrophoblast (part of the placenta). Its role is to prevent the disintegration of the corpus luteum of the ovary and thereby maintain progesterone production that is critical for a pregnancy in humans. hCG may have additional functions, for instance it is thought that it affects the immune tolerance of the pregnancy. Early pregnancy testing generally is based on the detection or measurement of hCG. Because hCG is produced also by some kinds of tumor, hCG is an important tumor marker, but it is not known whether this production is a contributing cause or an effect of tumorigenesis.
Its primary role is to support the corpus luteum which secretes estrogen and progesterone. These hormones are necessary to support a pregnancy during the first trimester. hCG levels rise when pregnancy is established and it is the hormone measured by pregnancy urine test kits.
hCG products such as Profasi and Pregnyl are derived from human tissue. Ovidrel is a new pure product that is derived from mammalian cell DNA technology. It is injected subcutaneously facilitating patient administration. hCG is extensively used as a parenteral fertility medication in lieu of luteinizing hormone. In the presence of one or more mature ovarian follicles, ovulation can be triggered by the administration of hCG. As ovulation will happen about 40-45 hours after the injection of hCG, procedures can be scheduled to take advantage of this time sequence. Thus, patients who undergo IVF, typically receive hCG to trigger the ovulation process, but have their eggs retrieved at about 36 hours after injection, a few hours before the eggs actually would be released from the ovary. In a normal menstrual cycle, the release of LH is triggered when hormones (such as estrogen) reach the appropriate levels. This is governed by hormonal relationships mediated though the hypothalamic-adrenal-pituitary axis. As hCG supports the corpus luteum, administration of hCG is used in certain circumstances to enhance the production of progesterone.
In the male, hCG injections are used to stimulate the leydig cells to synthesize testosterone. The intratesticular testosterone is necessary for spermatogenesis from the sertoli cells. Typical uses for hCG in men include hypogonadism and fertility treatment. In the world of performance enhancing drugs, hCG is increasingly used in combination with various anabolic androgenic steroid (AAS) cycles. When AAS are put into a male body, the body's natural negative feedback loops cause the body to shut down its own production of testosterone via shutdown of the HPTA (hypothalamic-pituitary-testicular axis). High levels of AASs that mimic the body's natural testosterone trigger the hypothalamus to shut down its production of gonadotropin-releasing hormone (GnRH) from the hypothalamus. Without GnRH the pituitary gland stops releasing luteinizing hormone (LH). LH normally travels from the pituitary via the blood stream to the testes where it triggers the production and release of testosterone. Without LH, the testes shut down their production of testosterone, causing testicular atrophy. In males, hCG mimics LH and helps restore / maintain testosterone production in the testes. As such, hCG is commonly used during and after steroid cycles to maintain and restore testicular size as well as endogenous testosterone production. However, if hCG is used for too long and in too high a dose, the resulting rise in natural testosterone will eventually inhibit its own production via negative feedback on the hypothalamus and pituitary.
During first few months of pregnancy, the transmission of HIV-1 from woman to fetus is extremely rare. It has been suggested this is due to the high concentration of hCG, and that the beta-subunit of this protein is active against HIV-1.
Its primary role is to support the corpus luteum which secretes estrogen and progesterone. These hormones are necessary to support a pregnancy during the first trimester. hCG levels rise when pregnancy is established and it is the hormone measured by pregnancy urine test kits.
hCG products such as Profasi and Pregnyl are derived from human tissue. Ovidrel is a new pure product that is derived from mammalian cell DNA technology. It is injected subcutaneously facilitating patient administration. hCG is extensively used as a parenteral fertility medication in lieu of luteinizing hormone. In the presence of one or more mature ovarian follicles, ovulation can be triggered by the administration of hCG. As ovulation will happen about 40-45 hours after the injection of hCG, procedures can be scheduled to take advantage of this time sequence. Thus, patients who undergo IVF, typically receive hCG to trigger the ovulation process, but have their eggs retrieved at about 36 hours after injection, a few hours before the eggs actually would be released from the ovary. In a normal menstrual cycle, the release of LH is triggered when hormones (such as estrogen) reach the appropriate levels. This is governed by hormonal relationships mediated though the hypothalamic-adrenal-pituitary axis. As hCG supports the corpus luteum, administration of hCG is used in certain circumstances to enhance the production of progesterone.
In the male, hCG injections are used to stimulate the leydig cells to synthesize testosterone. The intratesticular testosterone is necessary for spermatogenesis from the sertoli cells. Typical uses for hCG in men include hypogonadism and fertility treatment. In the world of performance enhancing drugs, hCG is increasingly used in combination with various anabolic androgenic steroid (AAS) cycles. When AAS are put into a male body, the body's natural negative feedback loops cause the body to shut down its own production of testosterone via shutdown of the HPTA (hypothalamic-pituitary-testicular axis). High levels of AASs that mimic the body's natural testosterone trigger the hypothalamus to shut down its production of gonadotropin-releasing hormone (GnRH) from the hypothalamus. Without GnRH the pituitary gland stops releasing luteinizing hormone (LH). LH normally travels from the pituitary via the blood stream to the testes where it triggers the production and release of testosterone. Without LH, the testes shut down their production of testosterone, causing testicular atrophy. In males, hCG mimics LH and helps restore / maintain testosterone production in the testes. As such, hCG is commonly used during and after steroid cycles to maintain and restore testicular size as well as endogenous testosterone production. However, if hCG is used for too long and in too high a dose, the resulting rise in natural testosterone will eventually inhibit its own production via negative feedback on the hypothalamus and pituitary.
During first few months of pregnancy, the transmission of HIV-1 from woman to fetus is extremely rare. It has been suggested this is due to the high concentration of hCG, and that the beta-subunit of this protein is active against HIV-1.
Wednesday, November 14, 2007
Follicle Stimulating Hormone (FSH)
Follicle stimulating hormone (FSH) is naturally produced by the pituitary gland and stimulates the recruitment and development of the ovarian follicles located on the ovaries, each of which contains an egg. FSH is also referred to as a pituitary gonadotropin. The production of FSH and other reproductive hormones is controlled by the complex interaction of several hormones in a biologic feedback system known as the "hypothalamic-pituitary-adrenal" axis. The hypothalamus is the "master gland" in control of regulating these processes.
The first FSH containing commercial gonadotropin in India, Pergonal, was released by Serono Laboratories. Pergonal is derived from the urine of post-menopausal women and purified for injection. FSH levels are higher in women who are menopausal making their urine a good source for extraction. Pergonal also contains leutinizing hormone (LH) which produces many effects including higher estrogen levels.Newer FSH products include Gonal-F and Recagon which are obtained from mammalian cell cultures through recombinant DNA technology. These products are pure and do not contain the "contaminants" seen in Pergonal. Pergonal has to be administered by intramuscular injection while the newer medications are given subcutaneously with much less discomfort Both human and genetically derived products are difficult to obtain and manufacture and are therefore expensive.
Opinions differ as to the need for additional LH in FSH stimulated cycles. Some physicians prefer protocols that combine products containing LH with Gonal-F (pure FSH). When a patient is "down regulated" with Lupride, or especially Ovurelix, natural levels of LH are reduced to very low levels and some externally administered LH is believed by many to be beneficial.
Egg quality is difficult (at best) to judge but some embryologists believe pure FSH cycles produce "better quality" eggs.
In procedures such as in vitro fertilization, FSH is administered by injection to cause the development of numerous eggs which can be retrieved and fertilized. When FSH is used in stimulated intrauterine insemination cycles, there is less control over how many eggs are ovulated thus increasing the chances of multiple births. Most cases of quadruplets, or more, result from stimulated IUI cycles. Patients must be closely monitored by a Fertility Physician to minimize the risk of multiple births.
FSH should only be administered by a Fertility Physician thoroughly trained in its use. Serious side effects can occur and patients must be closely monitored with estradiol hormone level measurements and ultrasound. Hyperstimulation is a very serious, but rare, complication that can result in stroke and other like threatening events. Side effects are minimized when these products are monitored by specialists with extensive clinical training in their use.
The first FSH containing commercial gonadotropin in India, Pergonal, was released by Serono Laboratories. Pergonal is derived from the urine of post-menopausal women and purified for injection. FSH levels are higher in women who are menopausal making their urine a good source for extraction. Pergonal also contains leutinizing hormone (LH) which produces many effects including higher estrogen levels.Newer FSH products include Gonal-F and Recagon which are obtained from mammalian cell cultures through recombinant DNA technology. These products are pure and do not contain the "contaminants" seen in Pergonal. Pergonal has to be administered by intramuscular injection while the newer medications are given subcutaneously with much less discomfort Both human and genetically derived products are difficult to obtain and manufacture and are therefore expensive.
Opinions differ as to the need for additional LH in FSH stimulated cycles. Some physicians prefer protocols that combine products containing LH with Gonal-F (pure FSH). When a patient is "down regulated" with Lupride, or especially Ovurelix, natural levels of LH are reduced to very low levels and some externally administered LH is believed by many to be beneficial.
Egg quality is difficult (at best) to judge but some embryologists believe pure FSH cycles produce "better quality" eggs.
In procedures such as in vitro fertilization, FSH is administered by injection to cause the development of numerous eggs which can be retrieved and fertilized. When FSH is used in stimulated intrauterine insemination cycles, there is less control over how many eggs are ovulated thus increasing the chances of multiple births. Most cases of quadruplets, or more, result from stimulated IUI cycles. Patients must be closely monitored by a Fertility Physician to minimize the risk of multiple births.
FSH should only be administered by a Fertility Physician thoroughly trained in its use. Serious side effects can occur and patients must be closely monitored with estradiol hormone level measurements and ultrasound. Hyperstimulation is a very serious, but rare, complication that can result in stroke and other like threatening events. Side effects are minimized when these products are monitored by specialists with extensive clinical training in their use.
Tuesday, November 13, 2007
Medications for Down Regulation
Lupride and Ovurelix are fertility drugs that "down regulate" reproductive hormone production causing a reduction in levels of follicle stimulating hormone, luteinizing hormone, and estrogen. Lupride and Ovurelix both cause these effects, however, by different physiologic mechanisms.
Lupride is widely used for the treatment of endometriosis and was the first "down regulator" used in in vitro fertilization cycles. Endometrial cells are dependent upon estrogen for growth and Lupride dramatically lowers estrogen levels. Unfortunately, this lowering is accompanied by the same side effects as menopause. Lupride and Ovurelix are administered according to specific protocols in IVF to prevent premature ovulation, and in some cases to exacerbate the response to follicle stimulating hormone (flare protocol).
Lupride is a GnRH agonist which works at the hypothalamus (a small gland located at the base of the brain ) whereas Ovurelix is a GnRH antagonist which completely blocks the effect of gonadotropin releasing hormone at the pituitary gland thus creating a "more complete "down regulation". IVF cycles are precisely timed to insure that the follicles are optimally developed at the time of retrieval. FSH is administered and dosages are adjusted based upon periodic ultrasound scans and estradiol measurements. In a "normal" or "non-stimulated" cycle, luteinizing hormone surges to signal ovulation. If this occurs too soon in an IVF cycle, ovulation could be triggered before the eggs are mature and the cycle could be lost. The LH surge cannot occur while Lupride or Ovurelix are administered and thus premature ovulation is prevented. Once the follicles are mature, an injection of hCG is given 36-38 hours prior to retrieval to signal ovulation. The body responds to hCG in the same manner as it does to LH.
Many infertility clinics choose to use Lupride or Ovurelix because the down regulation is more complete and the dosing regimen is easier. Lupride is started 7 days before the next expected menses and Ovurelix is started after 4 to 6 days of FSH/hMG stimulation. Doses vary dependent upon patient specific protocols.
Lupride is widely used for the treatment of endometriosis and was the first "down regulator" used in in vitro fertilization cycles. Endometrial cells are dependent upon estrogen for growth and Lupride dramatically lowers estrogen levels. Unfortunately, this lowering is accompanied by the same side effects as menopause. Lupride and Ovurelix are administered according to specific protocols in IVF to prevent premature ovulation, and in some cases to exacerbate the response to follicle stimulating hormone (flare protocol).
Lupride is a GnRH agonist which works at the hypothalamus (a small gland located at the base of the brain ) whereas Ovurelix is a GnRH antagonist which completely blocks the effect of gonadotropin releasing hormone at the pituitary gland thus creating a "more complete "down regulation". IVF cycles are precisely timed to insure that the follicles are optimally developed at the time of retrieval. FSH is administered and dosages are adjusted based upon periodic ultrasound scans and estradiol measurements. In a "normal" or "non-stimulated" cycle, luteinizing hormone surges to signal ovulation. If this occurs too soon in an IVF cycle, ovulation could be triggered before the eggs are mature and the cycle could be lost. The LH surge cannot occur while Lupride or Ovurelix are administered and thus premature ovulation is prevented. Once the follicles are mature, an injection of hCG is given 36-38 hours prior to retrieval to signal ovulation. The body responds to hCG in the same manner as it does to LH.
Many infertility clinics choose to use Lupride or Ovurelix because the down regulation is more complete and the dosing regimen is easier. Lupride is started 7 days before the next expected menses and Ovurelix is started after 4 to 6 days of FSH/hMG stimulation. Doses vary dependent upon patient specific protocols.
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