Influence of embryo quality on the outcome of frozen-thawed embryo transplantation.

Objective To observe the influnce of embryos quality on the pregnancy outcome of frozen-thawed embryo transplantationr(FET).Methods The embyo quality in 367 FET cycles were analyzed retrospectively.The embryos were divided into 2 groups according to their quality: blastomere damage group and non-top quality group.Then thawed embyos compared with each other according to their blastomere damage in each group.Results The embryo pregnancy rate and implantion rate of top quality group were higher than those of non-top quality group(P0.05).37.81% and 20.72% vs 22.86% and 10.57%.In each quality group,the embryo pregnancy rate and implantation rate of intact embryos was higher than damaged embryos.In top quality group.No difference was found between the intact embryo and damaged embryo and there were less than 2 damaged blastomere in the top quality group(P0.05).But the intact embryo pregnancy rate and implantion rate were higher than those of damaged embryos whose blastomere damaged more than 2 cells(P0.05).Conclusion Embryo quality influence the implantation rate in transplantation of frozen-thawed embryo.