Inclusion Criteria:  Age of women <43 years at the time of ovarian stimulation for IVF  Exclusion Criteria:  an abnormal uterine cavity shown on hysterosalpingogram or hysteroscopy, moderate or severe endometriosis, Recipient of oocyte donation and Undergoing preimplantation genetic testing Presence of hydrosalpinx or endometrial polyp which is not surgically treated patients with poor ovarian response (less than 3 mature follicles)