正常男性性功能依赖心理、神经、血管和内分泌诸因素协调作用。而在有关触发和维持勃起中哪种因素相对重要，存在较多争论，特别是睾酮的作用。来自不同的报告显示因内分泌失调而致勃起功能障碍的发生率从 １７％到 ３５％不等［３，１８］。Ｊｏｈｎｓｏｎ和Ｊａｒａｗ［４］? Normal male sexual function depends on the coordination of psychological, neurological, vascular and endocrine factors. And in the trigger and maintain erection in which of the more important factors, there is more controversy, especially the role of testosterone. Different reports have shown that the incidence of erectile dysfunction due to endocrine disorders ranged from 17% to 35% [3,18]. Johnson and Jaraw [4]?