IRCT20231119060109N1 IRCT 2023-12-05 Semnan University of Medical Sciences Effect of intra-uterine PRP injection on endometrial thickness and pregnancy result in women with recurrent implantation failure or thin endometrium under and over 35 years old undergoing freeze-thawed embryo transfer Comparative study of the effect of intra-uterine PRP injection on endometrial thickness and pregnancy result in women with recurrent implantation failure or thin endometrium under and over 35 years old undergoing freeze-thawed embryo transfer 2023-12-22 anticipated 62 Complete https://irct.ir/trial/73843 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Randomization description: In this study, randomization list of samples in groups will be generated using Random Allocation1 software. Then, according to the order of patient's referral and taking into account the criteria for entering the study, according to the patient's entry number from the list, the study group is announced to the researcher by the statistical consultant, and on each sample according to the study group , the intervention is done or they are placed in the control group. 3 Infertility. Intervention group: infertile women candidate for freeze-thawed embryo transfer who suffer from recurrent implantation failure or thin endometrium despite of hormone replacement. In intervention group PRP will be done.. Yes - There is a plan to make this available What will be shared: All participants data sets are to be shared. When: 2 months after publication of results. To whom: Researchers of academic centers Conditions: To evaluate the accuracy of data and to use them to complete other researches Where to obtain: Submit your request by sending an email. How to obtain: By sending an e-mail, by reviewing the request and providing documentation and the reason for using the data, it will be provided within a week. Comments: