The outcome of cryopreserved human embryos after intracytoplasmic sperm injection and traditional IVF

Objective: Our objective was to analyze the outcome of cryopreserved embryo s obtained after intracytoplasmic sperm injection (ICSI) and in vitro ferti lization (IVF) in terms of survival rate, implantation rate (IR), total and clinical pregnancy rate (PR) in a retrospective, comparative study Methods: Three hundred seventy-five IVF and 463 ICSI surnumerary cleaved em bryos, frozen on Day 2 with 1,2-propanediol, were thawed. Results: Thirty-two percent of the thawed IVF embryos survived and II pregn ancies (8 clinical) were obtained from 68 transfers (16. 1%). Fourty-seven percent of the ICSI ernbryos survived, with 19 pregnancies (18 clinical)fro m 116 transfers (164%). The IR was 8.5% (8/94) in IVF cycles and 10.8% (20/ 185) in ICSI cycles. Conclusions: A significantly better survival rate of (CSI embryos was obser ved but with no difference in PR, preclinical, and clinical abortion rate, or IR.