Male subfertility.
D006801:Humans; D007248:Infertility, Male / Q000209:etiology / Q000628:therapy; D008297:Male; D008487:Medical History Taking; D009845:Oligospermia / Q000209:etiology / Q000628:therapy; D012099:Reproductive Techniques; D012735:Sexual Dysfunction, Physiological / Q000209:etiology / Q000628:therapy; D013076:Sperm Count