Male fertility potential in terms of semen quality: a review of the past, a study of the present.
D002452:Cell Count; D005298:Fertility; D006801:Humans; D008297:Male; D012661:Semen / Q000032:analysis / Q000166:cytology*; D013091:Spermatogenesis; D013094:Spermatozoa / Q000166:cytology*; D013997:Time Factors