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Women may release eggs an ext than once throughout their monthly cycle, a brand-new study through a team of Canadian researcher suggests. Their findings might lead to renovations in fertility treatments, and also could also explain plenty of unexpected pregnancies. "We space in the at an early stage phases of understanding it, however it is rather a significant departure from what we all assumed was going on because that the last 50 years or so" claimed team leader roger Pierson, that the college of Saskatchewan, Saskatoon.The scientists lugged out everyday ultrasound scans on 63 women v normal term cycles aged in between 18-40, and also studied their developing egg follicles over six weeks. The was previously thought that at the beginning of a normal ovarian cycle, approximately 15-20 follicles start to grow, and also that one tires egg is released, around halfway v the cycle. However the researchers found that in many of the women, follicle development occurred not just once, but in two or three "waves" transparent the cycle. Although most ovulated once, between the 11th and 17th day, six of the ladies ovulated twice, and also seven not at all. In the staying 50 participants, 40 every cent had much more than one wave of follicle activity, which might potentially have resulted in ovulation. "We don"t know why part waves cause ovulation and others don"t" stated Pierson, although he speculated that luteinising hormone, i m sorry is developed following ovulation, can inhibit the release of another egg. He added that because that couples v fertility problems, it can be feasible to harness several of the non-ovulating waves into releasing eggs.Pierson claimed the results, released in the journal Fertility and Sterility, additionally showed exactly why the rhythm method of contraception (relying on a "safe" time of the monthly cycle to stop pregnancy) doesn"t work. Castle could additionally explain the incident of non-identical pair with various conception dates, and also why some ladies undergoing fertility treatment might not respond come ovary-stimulating medicines.

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"We"re probably giving at the very least some the these ladies drugs at the dorn time" states Pierson. The team are currently planning longer-term studies, to see if the women"s patterns are constant from month come month.
No "safe" time to stop pregnancy
CanWest news organization |8 July 2003
Ovary waves could rise IVF
BBC News virtual |9 July 2003
Women have the right to ovulate much more than once a month
New Scientist |9 July 2003
Women may ovulate an ext than once a month, examine says
Reuters |8 July 2003

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