Whitby R M, Gordon R D, Blair B R
Fertil Steril. 1979 May;31(5):518-20. doi: 10.1016/s0015-0282(16)43996-8.
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.
一项对54名男性输精管切除术后5年的血浆促黄体生成素（LH）和睾酮进行的前瞻性研究显示，睾酮或LH均无明显持续变化。术后1年的血浆LH水平高于术前水平，但未进一步升高。使用人绒毛膜促性腺激素的刺激研究（输精管切除术后4年）证实了睾丸间质细胞功能储备良好。
