10对夫妇中大约有1对是不生育的,而不育夫妇中35～40%为男性不育。男性不育的病因学因素包括睾丸的功能丧失和输精管阻塞,但已知的危险因素还不足以解释所有的男性不育,尤其是对无精和少精的病人。为查明与男性不育病因有关的环境危险因素,进行了本次病例——对照研究。受检对象为居住在意大利弗罗伦萨省的一些不育夫妇。为了查明不育病因,配偶双 About 1 in 10 couples are infertile, and 35 to 40% of infertile couples are male infertile. The etiological factors of male infertility include loss of testicular function and obstruction of the vas deferens, but known risk factors are not sufficient to explain all male infertility, especially in patients with azoospermia and oligospermia. In order to identify the environmental risk factors associated with the causes of male infertility, this case-control study was conducted. Subjects tested were some infertile couples living in Florença, Italy. To identify the cause of infertility, spouse pairs