title: The endocrine effects of vasectomy: a prospective five-year study.
abstract: A prospective study of plasma luteinizing hormone (LH) and testosterone in 54 men for 5 years following vasectomy revealed no significant continuing alteration in either testosterone or LH. Plasma LH levels 1 year after operation were higher than preoperative levels but did not increase further. Stimulation studies (4 years postvasectomy) using human chorionic gonadotropin confirmed acceptable Leydig cell functional reserve.
mesh_terms: D000328:Adult; D006063:Chorionic Gonadotropin / Q000494:pharmacology; D006801:Humans; D007985:Leydig Cells / Q000502:physiology; D007986:Luteinizing Hormone / Q000097:blood*; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D013739:Testosterone / Q000097:blood*; D014659:Vasectomy
chemical_list: D006063:Chorionic Gonadotropin; D013739:Testosterone; D007986:Luteinizing Hormone