title: Effect of postprepared sperm parameters and insemination specimen volume on the outcome of intrauterine insemination.
abstract: BACKGROUND
  The purpose of the present study was to identify the postprepared sperm parameters affecting the outcome of intrauterine insemination and to find out whether the volume of insemination specimen was a determinant factor in the rate of successful conception.
  
  
  METHODS
  A retrospective study including 306 couples was designed. The patients were inseminated with either 1.0 or 0.5 ml of prepared specimens. The pregnancy rates were compared using the chi-square test. Logistic regression was chosen for multivariant analysis of the parameters.
  
  
  RESULTS
  The only parameter significantly affecting the success rate was the postprepared sperm motility (p = 0.033). The pregnancy rate was 27.91% in cases with > or = 95% sperm motility. Only two patients with less than 75% sperm motility conceived. The pregnancy rates in cases with 0.5 ml and 1.0 ml inseminations were 12.12% and 16.13%, respectively. This difference was statistically insignificant (p = 0.427).
  
  
  CONCLUSIONS
  The postprepared sperm motility was the only parameter predicting the successful rate of intrauterine insemination. Seventy-five percent sperm motility can be used as a cut-off value for selecting patients. The volume of insemination specimen did not influence the outcome. Insemination with 1 ml of fluid was just as effective as insemination with 0.5 ml.
authors.affiliation: Department of Obstetrics and Gynecology, Chang Gung Memorial Hospital, Kaohsiung, Taiwan, R.O.C.
authors.forename: M Y
authors.initials: MY
authors.lastname: Tsai
authors.forename: Y C
authors.initials: YC
authors.lastname: Tsai
authors.forename: J C
authors.initials: JC
authors.lastname: Chang
authors.forename: F T
authors.initials: FT
authors.lastname: Kung
authors.forename: J F
authors.initials: JF
authors.lastname: Wu
authors.forename: S Y
authors.initials: SY
authors.lastname: Chang
authors.forename: L C
authors.initials: LC
authors.lastname: Yang
mesh_terms: D005260:Female; D006801:Humans; D007315:Insemination, Artificial; D016015:Logistic Models; D008297:Male; D015999:Multivariate Analysis; D011247:Pregnancy; D012189:Retrospective Studies; D013081:Sperm Motility