Fertility Tie to Menstrual Cycle Characteristics
An interesting study reported that certain characteristics of a woman’s menstrual cycle may confer increased fertility, while others may lead to a greater risk of miscarriage on women reproduction health.
This new study been investigated by Dr. Chanley M. Small of Emory University in Atlanta and colleagues followed 470 women for 1 year or the end of a pregnancy. They do investigation whether the length of a woman’s cycle and her menstrual bleed are related to fertility and pregnancy outcome.
All of those women kept diaries on their menstrual cycles and collected urine samples for at least 2 days during each cycle. As the result is 38% of the women became pregnant during the course of the study, with a total of 207 pregnancies and 30% of the pregnancies ended in miscarriage, as reported in the Epidemiology journal.
The pregnancy was most likely to occur after cycles lasting 30 to 31 days and and 40 percent less likely after shorter cycles. Miscarriage was 3 times more common after cycles that were either shorter than or longer than 30 to 31 days.
While spontaneous abortion was 60 percent less likely after periods lasting longer, the conception occurred most frequently after menstrual bleeds lasting 5 days
The researchers conclude that menstrual cycles may offer epidemiologists a noninvasive, immediate measure of reproductive health and may be useful for studying a variety of host conditions, occupational and environmental exposures
Source : Epidemiology, January 2006.
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One Response to “Fertility Tie to Menstrual Cycle Characteristics”
[…] First, straightforward attrition. Every woman is born with all the oocytes (eggs) she is ever going to have, usually seven million or so. By the time the average female hits puberty, there are about 250,000-300,000 remaining eggs in her ovaries. During each menstrual cycle, one egg matures ripe for fertilization and is released, but many others are not. This is how women start with 7 million eggs, ovulate 400 times and then run out. Second, eggs age right along with the rest of the body. Older oocytes have a greater incidence of chromosomal problems that increase the likelihood of miscarriage. […]
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