title: A controlled study to assess the use of in vitro fertilization with donor semen after failed therapeutic donor insemination.
abstract: OBJECTIVE
  To assess the outcome of in vitro fertilization and embryo transfer (IVF-ET) with donor semen in patients who have failed to achieve conception with therapeutic donor insemination (TDI).
  
  
  METHODS
  Retrospective, controlled study.
  
  
  METHODS
  All patients were managed and treated at the in vitro fertilization unit, John Radcliffe Hospital, Oxford, United Kingdom.
  
  
  METHODS
  Thirty-eight patients undergoing 63 cycles of IVF with donor semen were compared with a control group of patients undergoing the same treatment during the same time period for tubal disease (the subgroup with the best success rates in our program), matched for age, type of infertility (primary or secondary), and number of attempts at treatment.
  
  
  METHODS
  We compared number of follicles produced, number of oocytes retrieved, fertilization rates, number of embryos obtained, number of embryos transferred, quality of embryos transferred, blastocyst formation in sibling embryos produced, clinical pregnancy rates (PRs), pregnancy loss, and pregnancy outcome.
  
  
  METHODS
  Chi-squared test statistic with Yates' correction for continuity.
  
  
  RESULTS
  There was a statistically significant difference between the number of livebirths in the donor IVF-ET group (37) and the control group (18). The cumulative PR after four cycles for the donor IVF-ET group (83%) was statistically greater than that of the control group (59%). There was no significant difference in all other parameters compared.
  
  
  CONCLUSIONS
  Patients undergoing IVF-ET with donor semen have an excellent outcome. With the decline in PR after six cycles of TDI, early recourse to IVF-ET should be considered in this group of patients.
authors.affiliation: Nuffield Department of Obstetrics and Gynaecology, John Radcliffe Hospital, Oxford, United Kingdom.
authors.forename: J N
authors.initials: JN
authors.lastname: Robinson
authors.forename: G M
authors.initials: GM
authors.lastname: Lockwood
authors.forename: A
authors.initials: A
authors.lastname: Dokras
authors.forename: D M
authors.initials: DM
authors.lastname: Egan
authors.forename: C
authors.initials: C
authors.lastname: Ross
authors.forename: D H
authors.initials: DH
authors.lastname: Barlow
mesh_terms: D000328:Adult; D004624:Embryo Transfer; D005260:Female; D005307:Fertilization in Vitro; D006801:Humans; D007316:Insemination, Artificial, Heterologous; D011247:Pregnancy; D011256:Pregnancy Outcome; D012189:Retrospective Studies; D017211:Treatment Failure