title: Delayed vasectomy success in men with a first postvasectomy semen analysis showing motile sperm.
abstract: OBJECTIVE
  To determine the frequency of and factors associated with delayed vasectomy success in men with first postvasectomy semen analysis showing motile sperm.
  
  
  METHODS
  Descriptive study.
  
  
  METHODS
  One hospital-based family planning clinic and two private clinics from the Quebec City area, Canada.
  
  
  METHODS
  Three hundred nine men vasectomized between 1990 and 2001 and who had a first semen analysis showing motile sperm.
  
  
  METHODS
  None.
  
  
  METHODS
  Vasectomy success, based on the last available semen analysis-either in the medical record or as requested for the study-and on sterility as established by a telephone-based questionnaire in 2003.
  
  
  RESULTS
  Among the 309 men, 174 (56.3%, 95% confidence interval 50.7%-61.7%) had delayed vasectomy success. Significant independent factors associated with delayed vasectomy success were lower sperm count in the first postvasectomy semen analysis and shorter interval between vasectomy and first postvasectomy semen analysis.
  
  
  CONCLUSIONS
  Delayed vasectomy success occurs in more than half of men with a first postvasectomy semen analysis showing motile sperm. The decision to repeat vasectomy should not rely on a single semen analysis showing motile sperm.
authors.affiliation: Evaluation Research Unit, Research Center, Hôpital Saint-François d'Assise, Centre Hospitalier Universitaire de Québec (CHUQ), Quebec City, Quebec, Canada. michel.labrecque@mfa.ulaval.ca
authors.forename: Michel
authors.initials: M
authors.lastname: Labrecque
authors.forename: Karine
authors.initials: K
authors.lastname: St-Hilaire
authors.forename: Lucile
authors.initials: L
authors.lastname: Turcot
mesh_terms: D000328:Adult; D016001:Confidence Intervals; D006801:Humans; D008297:Male; D012661:Semen / Q000166:cytology*; D013076:Sperm Count / Q000706:statistics & numerical data*; D013081:Sperm Motility; D011795:Surveys and Questionnaires; D013997:Time Factors; D014659:Vasectomy / Q000706:statistics & numerical data*