title: IVF conversion to IUI in poor responders: an observational study.
abstract: OBJECTIVE
  The purpose of this study was to evaluate the significance of converting an IVF stimulation cycle with poor ovarian response to an IUI cycle.
  
  
  METHODS
  Between January and December 2007, 47 cycles of IVF conversion to IUI were retrospectively studied in 44 infertile women who had a low response to ovarian hyperstimulation for IVF. Patients' characteristics, ovarian stimulation, and ovarian response and outcome were collected and compared with those of 41 women undergoing ovum pickup for IVF with poor ovarian response (n = 44 cycles) in the same period.
  
  
  RESULTS
  Women in the conversion group had slightly lower ovarian reserve, shorter stimulation with higher rFSH doses, lower peak estradiol and fewer mature follicles than in the IVF group. Pregnancy rates were comparable in both groups, though clinical pregnancy rate tended to be higher in the conversion group than in the IVF group.
  
  
  CONCLUSIONS
  Thus, pregnancy rate in the conversion group compares favourably with IVF outcome in such circumstances. This means that IVF conversion to IUI in poor responders who are suitable for IUI is a valuable alternative that should be considered in their management.
authors.affiliation: Biologie et Médecine du développement et de la Reproduction, Hopital Mere et Enfant, CHU de Nantes, Nantes Cedex 3, France. thomas.freour@chu-nantes.fr
authors.forename: Thomas
authors.initials: T
authors.lastname: Freour
authors.forename: Sophie
authors.initials: S
authors.lastname: Dubourdieu
authors.forename: Sophie
authors.initials: S
authors.lastname: Mirallie
authors.forename: Marie Laure
authors.initials: ML
authors.lastname: Langlois
authors.forename: Miguel
authors.initials: M
authors.lastname: Jean
authors.forename: Paul
authors.initials: P
authors.lastname: Barrière
mesh_terms: D000328:Adult; D004958:Estradiol / Q000097:blood; D005260:Female; D005307:Fertilization in Vitro; D005640:Follicle Stimulating Hormone / Q000097:blood; D005602:France; D007987:Gonadotropin-Releasing Hormone / Q000097:blood; D006785:Hospitals, University; D006801:Humans; D007246:Infertility / Q000628:therapy*; D007315:Insemination, Artificial / Q000379:methods*; D008297:Male; D006080:Ovarian Follicle; D010062:Ovulation Induction; D011247:Pregnancy; D018873:Pregnancy Rate; D012189:Retrospective Studies; D013076:Sperm Count; D020554:Sperm Injections, Intracytoplasmic; D013081:Sperm Motility; D016896:Treatment Outcome
chemical_list: D007987:Gonadotropin-Releasing Hormone; D004958:Estradiol; D005640:Follicle Stimulating Hormone