IRCT20200825048515N32 IRCT 2021-05-10 Esfahan University of Medical Sciences The effectiveness of cyclogest and duphaston in supporting the luteal phase of infertility patients Comparison of the effectiveness of cyclogest and duphaston in supporting the luteal phase of infertility patients 2021-06-22 anticipated 100 Complete https://irct.ir/trial/55557 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Randomization description: In this study, 126 eligible patients will be randomly selected. Then random numbers are created by computer software "Random Allocation". We randomly divide these numbers into two parts. Each number is written on paper and placed in an envelope. Then each patient is asked to choose an envelope from among the envelopes. According to the selected envelope, the patient will be assigned to one of the two groups. 2 Female infertility. Intervention 1: Intervention first group: patients in this group are treated with dydrogesterone tablets (Duphaston 10 mg) (Abbott Company, Netherlands) every 12 hours for 12 weeks after embryo transfer. Intervention 2: Intervention second group: patients in this group are treated with vaginal progesterone suppository 400 mg (cyclogest 400 mg) (Hector Company, United Kingdom) every 12 hours for 12 weeks after embryo transfer. No - There is not a plan to make this available Justification or reason for not sharing IPD is There is no further information