PCOS (Polycystic Ovary Syndrome) is a hormonal disorder that affects 4-6% of women. It is characterized by chronic anovulation, hyperandrogenism, and polycystic ovaries. The cause is unclear but involves abnormal gonadotropin secretion and insulin resistance. Treatment focuses on weight loss, lifestyle changes, and medication to regulate menstrual cycles and reduce excess androgen levels. Women with PCOS have increased risk of diabetes, heart disease, and endometrial cancer. Management involves screening, lifestyle interventions, and medication to treat symptoms and prevent complications.