Case Presentation: The patient was a 19-year-old woman complaining of menstrual irregularities and was diagnosed with PCOS 5 years ago. The medications prescribed for 4 years had no significant therapeutic effect. The patient had menstrual irregularity and amenorrhea in the last 3 months. Ultrasound examination revealed bilateral polycystic ovaries. She underwent electroacupuncture (EA) for 14 sessions during 4 months in LI4, SP6, Ren19, ST36, and CV6 acupuncture points. According to ultrasound examination the polycystic view of ovaries disappeared in the 16th weeks of follow-up; sign of ovulation was observed in the ovaries and endometrial thickness increased. The ratio of luteinizing hormone (LH) to follicle stimulating hormone (FSH) reduced, and her most important complaint, i.e., menstrual irregularities, was almost completely eliminated, and the regular menstruation still continued up to six months after the last session of treatment.

Conclusion: Use of EA improved patient symptoms through reducing sympathetic tone in the arteries of uterine and ovaries as well as reflexive increasing of circulation through low-frequency contractions in the muscles.