Progestin-primed Ovarian Stimulation Protocol Versus GnRH Antagonist Protocol in Polycystic Ovary Syndrome Patients Undergoing IVF/ICSI Cycles

Inclusion Criteria: * Women who have a history of infertility ≥1year. * Ages between 20 and 35 years. * Patients diagnosed with PCOS according to the revised 2003 Rotterdam consensus and met 2 out of 3 criteria as follows (Rotterdam, 2004): * Oligo- and/or anovulation. * Biochemical and/or clinical evidence of hyperandrogenism. * Polycystic ovarian morphology on ultrasound (the presence of ≥12 antral follicles (≤9mm) and/or ovarian volume \>10mL on transvaginal ultrasonographic scanning). Other etiologies of hyperandrogenism and ovulatory dysfunction will be excluded, including androgen-secreting tumors, congenital adrenal hyperplasia, hyperprolactinemia and thyroid disease. Exclusion Criteria: * Endometriosis grade 3 or higher. * Documented ovarian failure, including basal FSH above 10IU/L. * Clinically significant systemic disease, or other endocrine disorders, including 21-hydroxylase deficiency, uncorrected thyroid disease or suspected Cushing's syndrome. * Patients who in the previous 3 months received hormonal treatments or other medications known to affect reproductive function, including oral contraceptives and GnRH agonists. * Documented history of ovarian surgery including laparoscopic ovarian drilling, ovarian endometrioma stripping and unilateral oophorectomy * Previous diagnosis of congenital (septate uterus, duplex uterus, uterus bicornis and uterus unicornis) or acquired (intrauterine adhesion, submucosal myomas and adenomyosis) uterine anomalies * H…