The outcome of cryopreserved human embryos after intracytoplasmic sperm injection and traditional IVF.
OBJECTIVE
Our objective was to analyze the outcome of cryopreserved embryos obtained after intracytoplasmic sperm injection (ICSI) and in vitro fertilization (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 embryos, frozen on Day 2 with 1,2-propanediol, were thawed.


RESULTS
Thirty-two percent of the thawed IVF embryos survived and 11 pregnancies (8 clinical) were obtained from 68 transfers (16.1%). Fourty-seven percent of the ICSI embryos survived, with 19 pregnancies (18 clinical) from 116 transfers (16.4%). 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 ICSI embryos was observed but with no difference in PR, preclinical, and clinical abortion rate, or IR.
Emiliani
S
S
Fertility Clinic, Hopital Erasme French Speaking Free University Brussels, Belgium.
Van den Bergh
M
M
Vannin
A S
AS
Biramane
J
J
Englert
Y
Y
D000328:Adult; D000367:Age Factors; D015925:Cryopreservation; D010064:Embryo Implantation; D004624:Embryo Transfer; D005260:Female; D005307:Fertilization in Vitro / Q000379:methods*; D006801:Humans; D008297:Male; D009865:Oocytes; D011247:Pregnancy; D018873:Pregnancy Rate; D012189:Retrospective Studies; D013094:Spermatozoa; D015996:Survival Rate