Male factor in sterility.
D000328:Adult; D006801:Humans; D007248:Infertility, Male / Q000175:diagnosis* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D012661:Semen / Q000166:cytology; D013094:Spermatozoa / Q000473:pathology; D013737:Testis / Q000473:pathology