title: Successful intracytoplasmic sperm injection without performing cytoplasmic aspiration.
abstract: OBJECTIVE
  To compare the effect of cytoplasmic aspiration versus no aspiration before intracytoplasmic sperm injection (ICSI) on the rate of oocyte damage, fertilization rate, and embryo quality.
  
  
  METHODS
  A randomized prospective study on sibling oocytes.
  
  
  METHODS
  The Egyptian IVF-ET Center, Cairo, Egypt.
  
  
  METHODS
  Fifty-eight patients who were infertile due to male factor who underwent 60 ICSI cycles.
  
  
  METHODS
  Intracytoplasmic sperm injection was performed on randomly allocated metaphase II oocytes with cytoplasmic aspiration in group I and without cytoplasmic aspiration in group II before sperm injection.
  
  
  METHODS
  Fertilization rate, oocyte damage rate, and embryo quality.
  
  
  RESULTS
  Normal fertilization rate per injected oocyte was 61.4% in group I compared with 62.5% in group II. The damage rate per injected oocyte was 16.8% in group I compared with 4.6% in group II. Grade I embryos were 24.5% in group I compared with 48.5% in group II.
  
  
  CONCLUSIONS
  Cytoplasmic aspiration before sperm injection in ICSI is not essential for oocyte activation. It did not improve the rate of normal fertilization. On the other hand, it increased the damaged oocyte rate and the rate of cytoplasmic fragments.
authors.affiliation: The Egyptian IVF-ET Center, Cairo, Egypt.
authors.forename: R T
authors.initials: RT
authors.lastname: Mansour
authors.forename: M A
authors.initials: MA
authors.lastname: Aboulghar
authors.forename: G I
authors.initials: GI
authors.lastname: Serour
authors.forename: N A
authors.initials: NA
authors.lastname: Tawab
authors.forename: Y
authors.initials: Y
authors.lastname: Amin
authors.forename: M A
authors.initials: MA
authors.lastname: Sattar
mesh_terms: D000328:Adult; D002453:Cell Cycle / Q000502:physiology; D003593:Cytoplasm / Q000502:physiology*; D005314:Embryonic and Fetal Development / Q000502:physiology; D005260:Female; D005306:Fertilization / Q000502:physiology; D005307:Fertilization in Vitro / Q000379:methods*; D006801:Humans; D007248:Infertility, Male / Q000628:therapy; D008297:Male; D008845:Microinjections / Q000379:methods* / Q000592:standards; D009865:Oocytes / Q000502:physiology; D011446:Prospective Studies; D013084:Sperm-Ovum Interactions / Q000502:physiology*; D013094:Spermatozoa / Q000502:physiology; D013396:Suction / Q000379:methods* / Q000592:standards