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Reply to message on FSH and phytoestrogens
Susannah D Copland, MD, MS posted:
I was not able to reply to the line of discussion, so I have posted a new discussion instead.
FSH level can fluctuate month to month. FSH goes up when feedback from the ovary from estrogen and other hormones is lower. A phyto-estrogen should suppress FSH, therefore taking a phyto-estrogen will not elevate your FSH. Since FSH can fluctuate, checking it month to month can cause you undue stress. In the absence of cigarette smoking and chemotherapy, your ovarian reserve and ability to respond to fertility medications declines slowly with age. Fertility physicians use FSH to predict the ability to respond to fertility medications, however tests like AMH and antral follicle count provide more information without the stress-inducing fluctuations of FSH.

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