Polycystic Ovary Syndrome (PCOS)

PCOS is a set of symptoms—including metabolic and reproductive—related to a hormonal imbalance.

PCOS symptoms can include menstrual irregularities, cardiovascular issues, acne, insulin resistance, and obstructive sleep apnea.

Research shows that genetic and environmental factors contribute to the development of PCOS; the exact cause of PCOS remains unknown.

Health care providers look for two or more features—absence of ovulation, resulting in light or skipped periods; high androgen levels; and follicle growths in one or both ovaries—to diagnose PCOS.

Treatments for PCOS, its specific symptoms, and its associated health problems vary, but they may include lifestyle changes, medications, and ways to remove or otherwise address increased hair growth.

NICHD research explores causes, predictors, treatments, and other topics related to PCOS.

NICHD conducts and supports a variety of clinical research projects related to PCOS.

Find answers to other frequently asked questions related to PCOS, the conditions associated with it, and its effects on pregnancy.

Links to websites of groups that study and provide information about PCOS.