Inclusion Criteria:  fresh oocyte donation cycles Anatomically anteverted-anteflexed recipient uterus partners with normal sperm parameters  Exclusion Criteria:  Data of women who did not give approval IVF cycles frozen-thawed embryo transfer cycles cryopreserved-thawed OD cycles abnormal sperm parameters or need of any testicular interventions Anatomically retroverted-retroflexed recipient uterus teneculum required embryo transfers difficult transfers