title: Higher abnormal fertilization, higher cleavage rate, and higher arrested embryos rate were found in conventional IVF than in intracytoplasmic sperm injection.
abstract: OBJECTIVE
  The aim of this study was to investigate whether performing different fertilization technologies (intracytoplasmic sperm injection [ICSI] and in vitro fertilization [IVF]) may affect the result of fertilization in the normal fertilization cycles.
  
  
  METHODS
  The authors performed a retrospective analysis of 164 cycles using sibling oocytes in combined IVF/ICSI with achieved a normal fertilization ( ≥ 25%) both conventional IVF and ICSI in this infertility centre.
  
  
  RESULTS
  It was found that there were no differences in 2PN rate (70.25% vs 70.60%), but higher cleavage rate in ICSI than IVF insemination (98.99% vs 96.81%), higher arrested embryos rate in IVF than ICSI in 2PN group (20.00% vs 13.95%), and higher abnormal fertilization IPN (3.87% vs 1.92%) and 3PN (3.63 vs 0.854%) in IVF than ICSI.
  
  
  CONCLUSIONS
  There were some differences fertilization outcomes between ICSI and IVF, which may be related to different procedures between two techniques.
authors.forename: Li
authors.initials: L
authors.lastname: Ming
authors.forename: Chen
authors.initials: C
authors.lastname: Yuan
authors.forename: Liu
authors.initials: L
authors.lastname: Ping
authors.forename: Qiao
authors.initials: Q
authors.lastname: Jie
mesh_terms: D000328:Adult; D002970:Cleavage Stage, Ovum; D005260:Female; D005306:Fertilization; D005307:Fertilization in Vitro / Q000379:methods*; D006801:Humans; D007246:Infertility / Q000628:therapy*; D009865:Oocytes; D012189:Retrospective Studies; D020554:Sperm Injections, Intracytoplasmic / Q000379:methods*; D016896:Treatment Outcome; D055815:Young Adult