Study Finds Menopause Symptoms Can Be PredictedThe number of eggs left in a woman's ovaries are like the grains of sand in an hourglass, ticking away the hours on her biological clock.Researchers now say they may be able to predict when that clock will wind down. And while doctors can't actually count the number of eggs in an ovary, they can measure ovarian volume. British researchers say there's a direct correlation between the two, and by measuring ovarian volume with transvaginal ultrasound, doctors should be able to predict when menopause will set in and how many fertile years a woman has left. According to the study authors, this information will revolutionize the care of women looking for assisted reproductive technologies, including those who were treated for childhood cancers as well as women who want to put off starting a family for whatever reason. Although information still needs to be validated in clinical studies, its benefit is most likely to start with women who are being treated for cancer and women attending fertility clinics, said Tom Kelsey, co-author of the study appearing June 17 in the journal Human Reproduction. "If women looking for some sort of assisted conception and their physicians know that they've got a long time till menopause, then you could plan for a range of treatments," said Kelsey, who is a senior research fellow at the University of St. Andrews in Scotland. "If you knew menopause was likely in four to five years, you'd plan a different set of IVF [in vitro fertilization] treatments." Others reiterate, however, that the findings should be treated with caution. "Should a young woman who is 30 years old go for a test to figure out whether she's got three, five or 10 years left on her fertility? Should she make career decisions and life decisions? Are these data good enough to make those determinations?" asked Dr. Alan Copperman, director of reproductive medicine at Mount Sinai Medical Center in New York City. "The answer is obviously no to all of those questions. The predictive value of this test is not good enough to go and tell someone to change their life." According to the article, eggs form in a female's ovary while she is still in the womb, peaking at several million about halfway through gestation and then starting a continuous decline. At birth, there are several hundred thousand and, when menstruation begins, about 300,000. At about age 37, a woman has about 25,000 eggs left, and at menopause only about 1,000. The time at which menopause sets in is widely believed to be based on the number of eggs reaching a critically low threshold. The authors of this study measured ovarian volume with transvaginal ultrasound, then looked at the relationship between ovarian volume -- ovaries shrink as a woman ages -- and number of eggs. They then applied mathematical and computer models to predict menopause. The study authors are negotiating with a medical school to set up clinical trials. The idea would be to follow women to see if their predictions were indeed correct. While these authors have come up with a tool to potentially help women plan their lives, a second study in the same issue of Human Reproduction warned that women might not want to leave it too late. Assisted reproductive technology (ART) could not be relied upon to fully compensate for lack of natural fertility after the age of 35, the article stated. The authors used a computer simulation model to determine that the overall success rate of assisted reproductive technology would be 30 percent for those attempting to get pregnant from age 30, 24 percent for those trying from age 35, and 17 percent from age 40. SOURCES: Tom Kelsey, Ph.D., senior research fellow, University of St. Andrews, St. Andrews, Scotland; Alan Copperman, M.D., director, reproductive medicine, Mount Sinai Medical Center, New York; June 17, 2004, Human Reproduction |
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Relation of Cardiovascular Risk Factors in Women Approaching Relation of Cardiovascular Risk Factors in Women Approaching Menopause to Menstrual Cycle Characteristics and Reproductive Hormones in the Follicular and CKS: Menopause - In depth - Background information What causes the menopause? Hormones and the normal menstrual cycle. The menstrual cycle begins with the onset of bleeding, and lasts about 28 days. Menopause and Menstruation and their Hormonal Manifestations Menopause and Menstruation: Hormonal Components. âœPlasma gonadotropin levels throughout the regular menstrual cycle in 10 Japanese women were measured Menstruation - Irregular Menstruation and periodical changes After that menstruation continues till menopause. Menstruation is also a natural process phase encompasses the average length of the menstruation cycle. Women Reproduction Female Reproductive Menopause Period Menstrual Every month from puberty to menopause, eggs begin to mature inside As these hormones are released, the monthly menstrual cycle occurs in three phases: Hormones of the Reproductive System Menopause. The menstrual cycle continues for many years. But eventually, usually between 42 and 52 years of age, the follicles become less responsive to FSH Influence of the menstrual cycle and of menopause on the gastric Key words:. Gastric emptying - Menstrual cycle -. Menopause. Eur J Nucl Med (1993) 20:600-602 phases of the menstrual cycle or after menopause have Menopause symptoms, diagnosis, and treatment on MedicineNet.com Menopause is defined as absence of menstrual periods for 12 months. The menopausal transition starts with varying menstrual cycle length and ends with the Menopause, Hormones, The Menstrual Cycle, Hormone Replacement Hormones And The Menstrual Cycle. How hormones affect the menopause. In order to understand what happens during perimenopause and menopause, and how hormone Menopause and Menstrual Cycles - womenshealthchannel To understand what happens hormonally during perimenopause and menopause, it helps to understand what happens hormonally during the menstrual cycle. Menstruation and the Menstrual Cycle Menstruation is part of the menstrual cycle, which prepares your body for pregnancy Like menstruation, menopause can vary from woman to woman and these Normal Menstrual Cycle - Yahoo! Health Perimenopausal Menstrual Cycle. Perimenopause, which means "around menopause," refers to the 2 to 8 years of changing hormone levels and related symptoms UNSW Embryology- Human Menstrual Cycle menopause- A complex physiological change that occurs generally as women age and falling hormone levels lead eventually to fertility loss. menstrual cycle- Menstrual Cycle: Biology of the Female Reproductive System: Merck Menstruation starts during puberty (at menarche) and stops permanently at menopause (see Menopause: Introduction). By definition, the menstrual cycle begins National MS Society : Sourcebook: Menstrual Cycle and Menopause MS is a disease that is more prevalent in premenopausal women than in other groups. While it is not entirely clear what effects hormonal changes have on Menstrual Cycles: What Really Happens in those 28 Days?! For most women, menopause occurs between the ages of forty and sixty and takes place over a period from 6 months to three years. The menstrual cycle usually Irregular periods - understanding the menstrual cycle By the way, it is a myth that a woman goes into menopause because her body runs out of . Articles on Menstruation; Menstruation and the menstrual cycle Irregular Menstrual Periods in Perimenopause and Menopause Irregular periods are a common symptom of perimenopause, the time before menopause itself. You may experience a change in the menstrual cycle, Approaching Menopause A woman may notice changes in her menstrual cycle several years before true menopause. The ovary has a finite number of eggs, and these begin to run out. |
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