Acupuncture for Oligomenorrhea Due to Polycystic Ovary Syndrome

Inclusion Criteria: * Oligomenorrhea (menstrual cycle\> 35 days or less than 8 cycles per year) plus at least one of the following two criteria; hyperandrogenism (clinical, biochemical, or both) and/or polycystic ovarian morphologic features \[12 or more antral follicles (2 to 9 mm in diameter) in either ovary, an ovarian volume that is greater than 10 ml in either ovary, or both\] * 20-40 years of age * Voluntary agreement to participate in this trial Exclusion Criteria: * Pregnancy, labor or breastfeeding within the past 3 months * Intake of oral contraceptive or ovulation inducing agent within the past 3 months * Severe oligomenorrhea with menstrual period over 3 months * Menstruation during more than 8 days * Premature ovarian failure * Resistant thyroid disease, Cushing's disease, congenital adrenal hyperplasia, or hyperprolactinemia * Ovarian tumor or adrenal tumor that cause hyperandrogenemia * Hemorrhagic disease * Severe cardiac, pulmonary, hepatic, or renal diseases, central nervous system disorders, or intake of psychoactive drug * Acupuncture treatment within the past one month * Participation in other clinical trial within the past 3 months * Other conditions judged to be inappropriate for the clinical study by the investigators