title: Effect of Percoll wash on sperm motion parameters and subsequent fertility in intrauterine insemination cycles.
abstract: OBJECTIVE
  This study examined sperm motion parameters as measured by computerized automated semen analysis before and after a Percoll wash and determined if differences in any parameter were correlated with fertility subsequent to intrauterine insemination (IUI).
  
  
  RESULTS
  Total motile sperm decreased following the washing procedure from 79.0 +/- 9.0 to 37.2 +/- 7.6 million sperm. Motility increased from a mean of 43.4% to 61.7% (P < 0.001). Other motility parameters also changed significantly (P < 0.001) as follows: curvilinear velocity (VCL), 43.4 to 61.7 microns/s; straight-line velocity (VSL), 21.3 to 26.7 microns/s; linearity 53.1 to 45.2%; lateral head displacement (ALH), 2.97 to 3.94 microns. Similar changes occurred following a swim-up preparation, although changes in mean motility, VCL, and ALH were significantly greater when compared to Percoll. The postwash changes were not accounted for merely by time lapse in preparation since reanalyzed untreated controls did not show the same changes in motion parameters. Prewash linearity in those specimens which resulted in pregnancies was greater than in those which did not (P = 0.28). No other significant differences in pre- or post-Percoll washed sperm motion parameters were found between pregnant vs nonfertile cycles.
  
  
  CONCLUSIONS
  Following Percoll wash all CASA-generated motility parameters were significantly altered, but there was little association between these parameters and pregnancy achieved in IUI cycles.
authors.affiliation: Department of Obstetrics and Gynecology, Union Memorial Hospital, Baltimore, Maryland 21218, USA.
authors.forename: M L
authors.initials: ML
authors.lastname: Swanson
authors.forename: J M
authors.initials: JM
authors.lastname: Collins
authors.forename: S F
authors.initials: SF
authors.lastname: Freiman
authors.forename: N H
authors.initials: NH
authors.lastname: Dubin
mesh_terms: D002469:Cell Separation / Q000379:methods*; D002499:Centrifugation, Density Gradient; D005260:Female; D005298:Fertility; D006801:Humans; D007315:Insemination, Artificial / Q000379:methods*; D008297:Male; D011205:Povidone / Q000494:pharmacology*; D011247:Pregnancy; D018873:Pregnancy Rate; D012661:Semen / Q000166:cytology; D012822:Silicon Dioxide / Q000494:pharmacology*; D013081:Sperm Motility / Q000187:drug effects*; D013094:Spermatozoa
chemical_list: C016039:Percoll; D012822:Silicon Dioxide; D011205:Povidone