Analysis of clinical outcomes of natural and HRT protocols for frozen thawed embryo transfer cycle

Objective:To compare the clinical outcomes of two protocols of frozen-thawed embryo transfer cycle.Methods:A retrospective analysis of the natural and HRT protocols in endometrial preparation for 130 frozen-thawed embryos transfer cycle, pregnancy rate, implantation rate, early abortion rate, ectopic pregnancy rate were compared between the two protocols.Results:There was no significant difference between the two groups with different clinical protocols in age, duration of infertility, pregnancy rate, implantation rate, quality of embryo transfer. However, there was significant difference in endometrial thickness. There was no significant difference in endometrial thickness, number of embryo transfer between the pregnancy and the non-pregnancy. However, the good-quality embryo number was significantly higher in the pregnancy group than that in the non-pregnancy one.Conclusion:Protocols for frozen-thawed embryos transfer all have favorable clinical outcome. The quality of embryo has a significant effect on the clinical pregnancy rate after FET.