STAR - Women may ovulate more!
Thursday, July 10 2003
Thursday, July 10,
Study: Women may ovulate more
TORONTO: Canadian researchers believe women may have the ability to
ovulate more than once during their menstrual cycle, according to a new study
published this week.
The research by the University of Saskatchewan, published in this week's
issue of scientific journal Fertility and Sterility, may shatter a
long-standing belief that women could only release an egg once during their
Previous studies showed that between 15 and 20 follicles grow in a woman's
ovaries at the start of her menstrual cycle. One of them matures and is released
to be fertilised, while the others died off.
But the Canadian researchers, sponsored by the Canadian Institutes of Health
Research, found that women actually experience a wave of this activity, with at
least two to three periods of follicular development each month.
“This work is particularly exciting to us because of the impact it will have
on women taking oral contraceptives and undergoing fertility treatment,” said
Doctor Roger Pierson, director of the university's Reproductive Biology Research
It also means “there is no 'safe' time to have intercourse during the cycle
(because) there may always be a follicle capable of ovulating,” he added.
Their study involved 63 women with normal menstrual cycles who underwent
ultrasound testing every day for a month.
“We are literally going to have to rewrite medical textbooks,” Pierson said.
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