title: A multicenter study evaluating the flowcytometric-based kit for semen analysis.
abstract: OBJECTIVE
  To evaluate the precision and accuracy of a flowcytometric-based semen analysis kit and its application in four fertility centers, as compared with routine microscopic evaluation.
  
  
  METHODS
  A prospective comparative study.
  
  
  METHODS
  Four fertility centers, located in Israel and the United States.
  
  
  METHODS
  Patients referred to fertility clinic for sperm evaluation.
  
  
  METHODS
  The precision of semen analysis by both methods was evaluated by inter- and intra-technician studies. The accuracy of the sperm counts obtained was assessed by counting a diluted sample and comparing the obtained results with the expected results according to the dilution factor.
  
  
  METHODS
  Sperm count, morphology, motility, viability, white cell count, antisperm antibodies.
  
  
  RESULTS
  The flowcytometric-based kit for semen analysis is more precise and accurate than the manual routine method. Smaller coefficient of variance (CV%) with results were obtained by the flowcytometric-based kit for all semen parameters as compared with the routine manual methods. Sperm density values determined by the flowcytometric-based kit correlated better with the dilution factor. The agreement rates between the flowcytometric and manual methods are sperm count 90%, motility 82%, vitality 70%, round cell counts 78%, and sperm bound antibodies 100%.
  
  
  CONCLUSIONS
  Semen analysis by flowcytometric-based kit is advantageous because of improved precision and accuracy compared with the routine method. It provides similar clinical information to that obtained by routine method for sperm count, motility, and antisperm antibodies, and more accurate results for round cell counts (labeled all subclasses) and vitality.
authors.affiliation: BioShaf Ltd., PO Box 487, Nesher 36603, Israel. shafi@actcom.net.il
authors.forename: Shafrira
authors.initials: S
authors.lastname: Shai
authors.forename: William
authors.initials: W
authors.lastname: Roudebush
authors.forename: Douglas
authors.initials: D
authors.lastname: Powers
authors.forename: Martha
authors.initials: M
authors.lastname: Dirnfeld
authors.forename: Dolores J
authors.initials: DJ
authors.lastname: Lamb
mesh_terms: D005434:Flow Cytometry / Q000379:methods* / Q000592:standards; D006801:Humans; D007248:Infertility, Male / Q000175:diagnosis*; D008297:Male; D011446:Prospective Studies; D011933:Reagent Kits, Diagnostic; D015203:Reproducibility of Results; D012661:Semen / Q000166:cytology*; D013076:Sperm Count / Q000295:instrumentation / Q000379:methods*
chemical_list: D011933:Reagent Kits, Diagnostic