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Abstract [Objective]To explore whether clinical outcome of frozen-thawed embryo transfer after the improved pro-tocol of antagonist for ovarian stimulation is better than that of fresh embryo transfer .[Methods]Clinical outcomes of 68 patients undergoing frozen-thawed embryo transfer following total embryo cryopreservation after the improved protocol of antagonist for ovarian stimulation (frozen-thawed embryo group ) and 82 concurrent patients undergoing fresh embryo transfer(fresh embryo group) in our center from June 2012 to Sept .2012 were analyzed retrospectively .[Results] The implantation rate and clinical pregnancy rate in frozen-thawed embryo group were 43 .38% and 66 .17% respectively , which were obviously higher than those in fresh embryo group (30 .98% and 42 .68% ,respectively)( P <0 .05) .There was no significant difference in the abortion rate (8 .89% vs .11 .43% ) and multiple pregnancy rate(31 .1% vs .34 .3% ) between two groups(all P>0 .05) .[Conclusion] Frozen-thawed embryo transfer following total embryo cryopreservation in the improved protocol of antagonist for ovarian stimulation can greatly improve the clinical pregnancy rate .
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2014, Vol. 31 
