This document discusses polycystic ovary syndrome (PCOS) in a 22-year-old woman presenting with irregular periods, weight gain, and signs of hyperandrogenism. PCOS is characterized by ovulatory dysfunction, hyperandrogenism, and polycystic ovaries. It increases the risk of metabolic syndrome, diabetes, and cardiovascular disease. Treatment involves lifestyle changes, oral contraceptives, clomiphene or letrozole for ovulation induction, and antiandrogens depending on the patient's symptoms and fertility goals. Screening for metabolic and endocrine abnormalities is also recommended.