Polycystic Ovary Syndrome (PCOS) is a hormonal disorder affecting up to 26% of women aged 15 to 44, characterized by irregular periods, high androgen levels, and ovarian cysts. It is linked to insulin resistance, inflammation, and genetic factors, leading to various symptoms such as heavy bleeding, weight gain, and acne. Diagnosis typically involves identifying symptoms and may include physical exams and lab tests, while treatment options include medication and lifestyle changes to manage symptoms and improve fertility.