Polycystic ovarian syndrome (PCOS) is the most common endocrine disorder of reproductive-age women. According to Rotterdam 2003 criteria: at least two of three criteria are met, hyperandrogenism, chronic anovulation, and polycystic ovary. PCOS will cause irregular menstrual cycle, infertility, acne, hirsutism, obesity, or/and metabolic syndrome, diabetes that may increase risk of cardiovascular disease.