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Research Suggests New Way To Gauge A Woman's Fertility

COLUMBUS, Ohio -- New research suggests that measuring the levels of two specific ovarian hormones may help doctors better determine the reproductive potential of older women.

Researchers found that measuring the levels of the hormones inhibin-a and inhibin-b were a more sensitive test of a woman’s ovarian reserve -- or reproductive potential -- than the most commonly used test today. The current test measures the levels of follicle stimulating hormone (FSH).

“Measuring inhibin levels may be a more accurate way to assess a woman’s fertility,” said Douglas Danforth, associate professor of obstetrics and gynecology at Ohio State University.

Production of inhibin-a and inhibin-b drops as a woman goes through perimenopause, the phase just before menopause. Because the inhibins are produced in the ovaries, they can serve as a direct measure of ovarian function.

The research appears in a recent issue of the journal Fertility and Sterility.

Danforth and his colleagues measured hormone levels in 25 women aged 39 to 52. Women in this age range are usually considered perimenopausal. All subjects still had normal menstrual cycles. Blood serum samples were analyzed for the hormone levels during specific times of the menstrual cycle.

The results showed that levels of inhibin-a and inhibin-b were lower in the women aged 46-52 than in the women aged 39-45. This is consistent with the fact that older women, who are nearer menopause, should have reduced ovarian function compared to younger women, Danforth said. However, the results showed no difference between the older and younger women in terms of FSH levels.

“This suggests that inhibin levels may be a more sensitive gauge of ovarian function than FSH levels,&
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Contact: Douglas Danforth
Danforth.2@osu.edu
614-688-3391
Ohio State University
29-Oct-1998


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