近50年来,包括中国在内的全世界成年男性的精子数量和质量都在下降。据报道,世界卫生组织调查显示,不孕不育症的发生约为育龄夫妇的8%～12%,其中男性因素占50%。而生精障碍引起的少精子症或无精子症又是造成男性不育的常见原因。睾丸是男性生殖系统的重要组成部分,其主要 In the past 50 years, the number and quality of sperm in adult men worldwide, including China, have been declining. According to reports, the World Health Organization survey shows that the incidence of infertility is about 8% to 12% of couples of childbearing age, of which male factors accounted for 50%. Spermatogenic disorders caused by oligozoospermia or azoospermia is a common cause of male infertility. Testicles are an important part of the male reproductive system, its main