Polycystic Ovary Syndrome (PCOS) is a common cause of irregular periods and infertility in women of reproductive age, affecting 5-10% of women. It is associated with increased levels of androgens and insulin resistance. Women with PCOS have an increased risk of health issues like endometrial cancer, diabetes, cardiovascular disease, and metabolic syndrome. Diagnosis involves evaluating symptoms, family history, ultrasound of ovaries, and hormone levels. Treatment focuses on lifestyle changes, oral contraceptives, and medications to improve insulin sensitivity and reduce androgen levels.