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What Is Polycystic Ovarian Syndrome (PCOS)?
Medically reviewed by Leyla Bilali, RN
Polycystic ovarian syndrome, or PCOS, is an endocrine disorder and a common cause of infertility in women. In PCOS, hormones that affect the reproductive system are abnormal, leading to irregular or absent ovulation. PCOS is a common disorder, affecting roughly 4% to 12% of women.