title: Prospective randomized trial of the effect of two flushing media on oocyte collection and fertilization rates after in vitro fertilization.
abstract: OBJECTIVE
  To assess the value of heparinized saline as a flushing medium for oocyte recovery.
  
  
  METHODS
  Prospective randomized study.
  
  
  METHODS
  Academic tertiary referral center for fertility treatment.
  
  
  METHODS
  Thirty-five patients, with both ovaries intact having IVF-ET.
  
  
  METHODS
  Patients were randomized either to have the follicles of the left or right ovary flushed with heparinized normal saline at the time of oocyte recovery for IVF-ET. The contralateral ovary was flushed with heparinized culture medium. Oocytes obtained from each side were cultured separately and assessed for fertilization 18-21 hours after insemination.
  
  
  METHODS
  Collection and fertilization rates.
  
  
  RESULTS
  A total of 481 follicles were aspirated yielding 366 oocytes. Of these, 240 fertilized. From the side flushed with saline 185 oocytes were collected from 237 follicles, which was not significantly different from 181 oocytes collected from 244 follicles on the side flushed with culture medium (odds ratio = 1.23; 95% confidence interval = 0.79-1.92). Similarly, there was no significant difference observed in fertilization rates between oocytes obtained after saline (median 71.4%) and culture medium flush (median 75.0%) (odds ratio = 1.08; 95% confidence interval = 0.68-1.72).
  
  
  CONCLUSIONS
  Heparinized normal saline is an equally good but cheaper and more convenient medium than standard heparinized culture medium and could replace it for flushing follicles during oocyte recovery for IVF-ET procedures.
authors.affiliation: McGill Reproductive Center, Department of Obstetrics and Gynecology, Royal Victoria Hospital, McGill University, Montreal, Canada. marinko@rvhob2.lan.mcgill.ca
authors.forename: M M
authors.initials: MM
authors.lastname: Biljan
authors.forename: N
authors.initials: N
authors.lastname: Dean
authors.forename: R
authors.initials: R
authors.lastname: Hemmings
authors.forename: F
authors.initials: F
authors.lastname: Bissonnette
authors.forename: S L
authors.initials: SL
authors.lastname: Tan
mesh_terms: D000328:Adult; D003470:Culture Media / Q000191:economics; D005260:Female; D005307:Fertilization in Vitro / Q000379:methods*; D006493:Heparin; D006801:Humans; D009865:Oocytes; D011247:Pregnancy; D011446:Prospective Studies; D012965:Sodium Chloride / Q000191:economics
chemical_list: D003470:Culture Media; D012965:Sodium Chloride; D006493:Heparin