IRCT20180624040214N3 IRCT 2021-06-29 Tehran University of Medical Sciences The effect of endometrial compaction on the occurrence of pregnancy. The effect of endometrial compression on pregnancy rate in embryo transfer cycles in infertile women IVF candidate of Imam Khomeini Hospital in Tehran in 2020-2021. 2021-07-06 anticipated 41 Complete https://irct.ir/trial/56269 interventional Randomization: Not randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment. 3 Female infertility. Intervention 1: Intervention group: Candidate patients for IVF who underwent vaginal progesterone suppository for 5 days They receive 800 mg daily. Intervention 2: Control group: Candidate patients for IVF cycle who did not receive progesterone suppository. No - There is not a plan to make this available Justification or reason for not sharing IPD is patients privacy