Effect of Berberine on Hormonal and Metabolic Features in Obese Women With Polycystic Ovary Syndrome (PCOS)

Inclusion Criteria 1. Age of women between 18 and 35 years. 2. Confirmed diagnosis of PCOS according to the modified Rotterdam criteria and all subjects must have anovulation plus either polycystic ovaries and/or hyperandrogenism. 3. Body mass index (BMI) equal to or greater than 23 kg/m2. 4. With no desire of children within 6 month. PCOS is defined by the modified Rotterdam criteria: oligomenorrhea or amenorrhea, together with presence of ≥12 antral follicles (≤9mm) and/or ovarian volume \>10 ml on transvaginal scanning, and/or clinical/biochemical hyperandrogenism. Oligomenorrhea is defined as an intermenstrual interval \>35 days and \<8 menstrual bleedings in the past year. Amenorrhea is defined as an intermenstrual interval \>90 days. Clinical hyperandrogenism in China Mainland is defined as a Ferriman-Gallwey (FG) score ≥5. Exclusion criteria are 1. Use of hormonal drugs or other medications including Chinese Herbal prescriptions in the past 3 months. 2. Patients with other endocrine disorders including 21-hydroxylase deficiency, hyperprolactinemia, uncorrected thyroid disease, suspected Cushing's syndrome 3. Patients with known sever organ dysfunction or mental illness.