IRCT20200305046702N1 IRCT 2020-10-27 Yazd University of Medical Sciences Effect of HCG Injection in Frozen Thawed Embryo Transfer Cycls in Patients with Repeated Implanttion Failure Comparison the Effect of intra Uterin and Intra Muscular HCG Injection 3 Days Before Transfer in frozen Thawed Embryo Transfer Cycls in Patients with Repeated Implantation Failure 2020-06-20 anticipated 210 Complete https://irct.ir/trial/46450 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Randomization description: simple individual randomization with computerized digit number table. Randomization will be performed with simple method and random numbers generated by computer soft ware( Stat trek soft ware) wich choose the random numbers. then, we consider the specific numbers for both groups for example: the even numbres are for intervention group and the odd numbres are for the control group. 3 infertility. Intervention 1: Intervention group : Endometrial preparation will be done for 20-40 years old infertile woman with recurrent implantation failure who are candidate for frozen thawed embryo transfer from second day cycle with 6 mg daily estradiol and serial sonography will be done from 12th day of cycle ; when thickness reaches 7 mm ,they receive 500 unit intramuscular HCG along with 400 mg progesterone , 3 days before embryo transfer will be done. Intervention 2: Intervention group : Endometrial preparation will be done for 20-40 years old infertile woman with recurrent implantation failure who are candidate for frozen thawed embryo transfer from second day cycle with 6 mg daily estradiol and serial sonography will be done from 12th day of cycle ; when thickness reaches 7 mm ,they receive 500 unit intrauterine HCG along with 400 mg progesterone , 3 days before embryo transfer will be done. No - There is not a plan to make this available Justification or reason for not sharing IPD is no more information exist