de Kretser D M
Institute of Reproduction and Development, Monash University, Monash Medical Centre, Clayton, Vic, Australia.
Reprod Fertil Dev. 1998;10(1):93-5. doi: 10.1071/r98022.
Semen quality is said to have been declining over the past 50 years. The biological significance of these changes is emphasized by a concomitant increase in the incidence of genitourinary abnormalities such as testicular cancer and cryptorchidism. The increase in regional frequency of testicular abnormalities over a relatively short period of time may be due to local environmental factors, including the comparatively recent fashion for wearing tight-fitting underwear. Data also indicates that prenatal exposure to environmental agents can affect the development of the male genital tract. From the reproductive point of view, an increased environmental impact on the human male gonad is of concern and merits the development of sensitive techniques that can detect deleterious agents.
据说在过去50年里精液质量一直在下降。生殖泌尿系统异常（如睾丸癌和隐睾症）发病率的相应增加突出了这些变化的生物学意义。在相对较短的时间内睾丸异常的区域发生率增加可能是由于当地环境因素，包括相对近期流行的穿紧身内衣的时尚。数据还表明，产前接触环境因素会影响男性生殖道的发育。从生殖角度来看，环境对人类男性性腺的影响增加令人担忧，值得开发能够检测有害因素的敏感技术。
