Scientists Finally Think They Know What Causes Polycystic Ovary Syndrome - And How To Cure It

Polycystic ovary syndrome (PCOS) is a condition that affects roughly one in five women - and now, scientists think they know why. (Just in time for National Women's Health Week.) A study published in Nature Medicine found a link between hormonal imbalance in the womb and PCOS, specifically prenatal exposure to a growth factor called anti-Müllerian hormone (AMH).