title: [Semen quality of 16 835 infertile men in China].
abstract: OBJECTIVE
  To evaluate the fertility of infertile males of large samples by the routine semen examination, and to provide a scientific basis for clinical treatment of male infertility and improve efficacy.
  
  
  METHODS
  We collected 16 835 semen specimens of infertile man in our hospital (the infertility group), and 1 567 semen specimens of sperm donating candidates from the sperm bank of our hospital (the control group). Semen routine examination was performed by computer-assisted semen analysis (CASA) technology, and the data of semen routine examination were analyzed statistically.
  
  
  RESULTS
  The infertile patients with semen abnormalities in our hospital mainly suffered asthenospermia. The proportion of azoospermia, asthenospermia and oligoasthenospermia in the infertility group was higher than that in the control group, while the proportion of oligozoospermia was lower than that in the control group (P<0.001).
  
  
  CONCLUSIONS
  Azoospermia, asthenospermia and oligoasthenospermia are related to infertility, but simply oligozoospermia is not necessarily related to infertility.
authors.affiliation: Institute of Human Reproduction and Stem Cell Engineering, Central South University; Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha 410078, China.
authors.forename: Weina
authors.initials: W
authors.lastname: Li
authors.forename: Wenbing
authors.initials: W
authors.lastname: Zhu
authors.forename: Zhangming
authors.initials: Z
authors.lastname: Tang
authors.forename: Gang
authors.initials: G
authors.lastname: Liu
mesh_terms: D053627:Asthenozoospermia; D053713:Azoospermia; D002681:China; D006801:Humans; D007248:Infertility, Male / Q000453:epidemiology*; D008297:Male; D009845:Oligospermia; D055101:Semen Analysis; D013076:Sperm Count; D013094:Spermatozoa / Q000473:pathology