title: Computer-Assisted Sperm Analysis (CASA) parameters and their evolution during preparation as predictors of pregnancy in intrauterine insemination with frozen-thawed donor semen cycles.
abstract: OBJECTIVE
  To study the potential of CASA parameters in frozen-thawed donor semen before and after preparation on silica gradient as predictors of pregnancy in IUI with donor semen cycles.
  
  
  METHODS
  CASA parameters were measured in thawed donor semen before and after preparation on a silica gradient in 132 couples undergoing 168 IUI cycles with donor semen. The evolution of these parameters throughout this process was calculated. The relationship with cycle outcome was then studied.
  
  
  RESULTS
  Clinical pregnancy rate was 18.4% per cycle. CASA parameters on donor semen before or after preparation were not significantly different between pregnancy and failure groups. However, amplitude of lateral head displacement (ALH) of spermatozoa improved in all cycles where pregnancy occurred, thus predicting pregnancy with a sensitivity of 100% and a specificity of 20%.
  
  
  CONCLUSIONS
  Even if CASA parameters do not seem to predict pregnancy in IUI with donor semen cycles, their evolution during the preparation process should be evaluated, especially for ALH. However, the link between ALH improvement during preparation process and pregnancy remains to be explored.
authors.affiliation: Service de Biologie du Développement et Médecine de la Reproduction, Centre Hospitalier Universitaire de Nantes, Nantes France. thomas.freour@chu-nantes.fr
authors.forename: Thomas
authors.initials: T
authors.lastname: Fréour
authors.forename: Miguel
authors.initials: M
authors.lastname: Jean
authors.forename: Sophie
authors.initials: S
authors.lastname: Mirallié
authors.forename: Sophie
authors.initials: S
authors.lastname: Dubourdieu
authors.forename: Paul
authors.initials: P
authors.lastname: Barrière
mesh_terms: D015925:Cryopreservation; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D007316:Insemination, Artificial, Heterologous / Q000379:methods*; D008297:Male; D011247:Pregnancy; D018873:Pregnancy Rate; D055101:Semen Analysis; D012662:Semen Preservation; D013077:Sperm Head / Q000648:ultrastructure; D013081:Sperm Motility; D014019:Tissue Donors