title: [Fertilization rates following 109 half intracytoplasmic sperm injection cycles for in vitro fertilization-embryo transfer].
abstract: OBJECTIVE
  To evaluate the clinical outcomes of half intracytoplasmic sperm injection (partial ICSI) treatment in infertile patients with potential fertilization failure.
  
  
  METHODS
  A total of 109 partial ICSI cycles of in vitro fertilization-embryo transfer (IVF-ET) were classified into 5 groups, namely group A (infertile patients for unidentified causes, 17 cycles), group B (oligo-asthenozoospermia patients, 28 cycles), group C (teratozoospermia patients, 8 cycles), group D (primary infertile patients without definite causes, 31 cycles), and group E (secondary infertile patients without definite causes, 25 cycles). The fertilization rate and normal fertilization rate after IVF and ICSI were compared between the groups.
  
  
  RESULTS
  Significant differences were found in the fertilization rate following conventional IVF and ICSI in group A (53.1-/+38.8% vs 72.2-/+34.1%) and group D (58.8-/+31.6% vs 82.7-/+21.4%) (P<0.05), but not in groups B, C and E (P>0.05). The normal fertilization rates following IVF and ICSI in groups A, B, D, E were statistically different (P<0.05), but similar in group C (P>0.05).
  
  
  CONCLUSIONS
  ICSI treatment may increase the fertilization rate of IVF-ET in patients with unexplained infertility and primary infertility, but not in patients with oligo-asthenozoospermia, teratozoospermia or secondary infertility.
authors.affiliation: Center of Assisted Reproductive Technology, Guangzhou General Hospital of Guangzhou Command, Guangzhou 510010, China. iris92@126.com
authors.forename: Xin-yu
authors.initials: XY
authors.lastname: Guo
authors.forename: Jin-yu
authors.initials: JY
authors.lastname: Zhnag
authors.forename: De-wei
authors.initials: DW
authors.lastname: Lin
authors.forename: Yan
authors.initials: Y
authors.lastname: Yu
authors.forename: Ming-xiao
authors.initials: MX
authors.lastname: Ge
mesh_terms: D000328:Adult; D053627:Asthenozoospermia; D004624:Embryo Transfer; D005260:Female; D006801:Humans; D007248:Infertility, Male / Q000628:therapy*; D008297:Male; D011247:Pregnancy; D011256:Pregnancy Outcome; D012189:Retrospective Studies; D020554:Sperm Injections, Intracytoplasmic; D013094:Spermatozoa / Q000002:abnormalities