Inclusion Criteria:  Women diagnosed with PCOS according to modified Rotterdam criteria which includes menstrual abnormalities combined with either hyperandrogenism (hirsutism diagnosed by modified Ferriman-Gallwey score or elevated total testosterone level) or polycystic ovaries. Women ages ≥20 and <40years old. BMI less than 35. Women who have a history of primary infertility. All patients will receive adjuvant drugs for ovulation induction (metformin from preceding cycle, cabergoline 1 tab daily for 8 days and 500 cc colloid solution on day of ovum pick up).  Exclusion Criteria:  History of unilateral oophorectomy. Uterine abnormalities such as a malformed uterus (unicornuate, septate uterus), adenomyosis, submucous myoma or intrauterine adhesion. Severe male factor for infertility such as azoospermia. History of repeated ICSI trials failure. Women who are unable to comply with the study procedures.