title: Outcome of sperm preparation using double-gradients technique study in Siriraj Hospital.
abstract: OBJECTIVE
  To determine the succession of sperm preparation using the double-gradients technique on sperm quality: sperm recovery rate, sperm concentration, sperm motility and percentage of post wash total motile sperm count.
  
  
  METHODS
  Retrospective descriptive study.
  
  
  METHODS
  Infertility clinic, Faculty of Medicine, Siriraj hospital.
  
  
  METHODS
  During the period of January 1, 2002 through December 31, 2007, data including semen analysis before and after IUI procedure were reviewed in all male patients who were referred to the andrology laboratory for sperm washing and IUI. Comparison of semen parameters such as total sperm concentration, total motile sperm count before and after sperm preparation as well as total sperm recovery rate and total motile sperm recovery rate was evaluated.
  
  
  RESULTS
  After sperm preparation, both sperm concentration and progressive sperm motility significantly increased, while total motile sperm count significantly decreased. Moreover, the percentage of motile sperm recovery rate and total sperm recovery rate was higher after sperm preparation at around 59.88 +/- 19.26% and 34.03 +/- 14.58% respectively. When categorizing semen parameters to 4 groups: normozoospermia, oligozoospermia, astenozo-ospermia and oligo-astenozoospermia, sperm motility in each group, comparing with sperm motility prior preparation, significantly improved after sperm preparation. Furthermore, motile sperm recovery rate in each group significantly increased except for astenozoospermia. Total sperm recovery rate in oligozoospermia was significantly higher than normozoospermia, yet the others were significantly lower.
  
  
  CONCLUSIONS
  Sperm preparation using double gradient percoll provided a high percentage of motile sperm recovery rate and total sperm recovery rate. It also dramatically improved progressive sperm motility in normozoospermia, oligozoospermia, astenozoospermia and oligo-astenozoospermia.
authors.affiliation: Infertility Unit, Faculty of Medicine, Siriraj Hospital, Bangkok, Thailand.
authors.forename: Somsin
authors.initials: S
authors.lastname: Petyim
authors.forename: Roungsin
authors.initials: R
authors.lastname: Choavaratana
authors.forename: Singpetch
authors.initials: S
authors.lastname: Suksompong
authors.forename: Pitak
authors.initials: P
authors.lastname: Laokirkkiat
authors.forename: Orawan
authors.initials: O
authors.lastname: Makemaharn
mesh_terms: D000328:Adult; D002499:Centrifugation, Density Gradient; D003102:Colloids; D006786:Hospitals, Urban; D006801:Humans; D007248:Infertility, Male / Q000628:therapy; D008297:Male; D011205:Povidone; D012189:Retrospective Studies; D012822:Silicon Dioxide; D013076:Sperm Count; D013081:Sperm Motility / Q000502:physiology; D013785:Thailand; D020858:Tissue and Organ Harvesting / Q000379:methods*
chemical_list: D003102:Colloids; C016039:Percoll; D012822:Silicon Dioxide; D011205:Povidone