Comparison of Progestin Primed Ovarian Stimulation (PPOS) vs.GnRH Antagonist Methods on IVF Outcomes

Inclusion Criteria: * BMI \> 18 kg/m2 ve \<35 kg/m2 * Couples that accept being included in the study * Couple accepting thawed embryo transfer Exclusion Criteria: * Known chromosomal abnormality in either member of the couple * Couples with unexplained infertility * BMI \> 30 kg/m2 * Mullerian malformations * Undergoing oocyte cryopreservation for medical reasons (such as malignancies) * Couple insists on fresh embryo transfer