How does polycystic ovary syndrome (PCOS) affect a woman while pregnant?

There appears to be higher rates of miscarriage, gestational diabetes, pregnancy-induced high blood pressure (pre-eclampsia), and premature delivery in women with PCOS. Researchers are studying how the diabetes medicine metformin can prevent or reduce the chances of having these problems while pregnant. Metformin also lowers male hormone levels and limits weight gain in women who are obese when they get pregnant.

Metformin is an FDA pregnancy category B drug. It does not appear to cause major birth defects or other problems in pregnant women. But, there have been no studies of metformin on pregnant women to confirm its safety. Talk to your doctor about taking metformin during pregnancy or if you are trying to become pregnant. Also, metformin is passed through milk in breastfeeding mothers. Talk with your doctor about metformin use if you are a nursing mother.

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Information is provided by:  The National Women's Health Information Center which is Sponsored by the Office on Women's Health in the U.S. Department of Health and Human Services