[Effect of age on semen quality].
D000328:Adult; D000367:Age Factors; D000368:Aged; D005298:Fertility; D006801:Humans; D008297:Male; D008875:Middle Aged; D012661:Semen / Q000032:analysis / Q000166:cytology*; D013076:Sperm Count; D013081:Sperm Motility