Journal of Andrology Proceedings of the Fifth International Conference on the Epididymis
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Table. Progressive motility and ability to bind to or fertilize the egg, depending on the study, of sperm from the caput (CAP), corpus (COR), and cauda (CDA) epididymides of 4 mammalian species, including the human. Immature sperm in the caput can neither bind to nor fertilize the egg; mature sperm in the cauda can do both
    Humana
  Boarb
  Ratc
  Moused
    CPT   COR   CDA   CPT   COR   CDA   CPT   COR   CDA   CPT   COR   CDA
  Progressive motility, %   3   30   60   1   56   83   0   15   98   0   65   93
  Sperm bind/fert, %e   0   11   43   ...   54   83   0   10   75   0   89   95
  a Epididymal sperm from humans were from collected from elderly men undergoing therapeutic orchidectomy; thus their sperm motility and fertilizing capacities are reduced relative to the values from healthy laboratory animals within their normal breeding ages. Data from Moore et al (1983).
  b Data from Hunter et al (1976) and Dacheux and Paquignon (1980).
  c Data from Blandau and Rumer (1964) and Turner (1995).
  d Data from Lacham and Trounson (1991).
  e Percentage of ova binding sperm or having been fertilized in vitro, depending on the study.





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