The varicocele.
D000818:Animals; D004195:Disease Models, Animal; D006801:Humans; D008297:Male; D009845:Oligospermia / Q000209:etiology; D010690:Phlebography; D013076:Sperm Count; D013081:Sperm Motility; D013094:Spermatozoa / Q000473:pathology; D014646:Varicocele / Q000175:diagnosis / Q000503:physiopathology / Q000601:surgery