title: The outcome of cryopreserved human embryos after intracytoplasmic sperm injection and traditional IVF.
abstract: 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.
authors.affiliation: Fertility Clinic, Hopital Erasme French Speaking Free University Brussels, Belgium.
authors.forename: S
authors.initials: S
authors.lastname: Emiliani
authors.forename: M
authors.initials: M
authors.lastname: Van den Bergh
authors.forename: A S
authors.initials: AS
authors.lastname: Vannin
authors.forename: J
authors.initials: J
authors.lastname: Biramane
authors.forename: Y
authors.initials: Y
authors.lastname: Englert
mesh_terms: 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