作者于1986年10月对某皮鞋厂接触混合苯(苯、甲苯、二甲苯)的女工进行了自然流产率的调查.接触组为配胶和刷胶女工,71名,平均年龄30.5岁(27～34岁),工龄5年以上。71名女工均在接触混合苯后曾妊娠,妊娠期间继续在原岗位工作,除外妊娠期间服用致畸药物史、病毒感染史、生殖系统疾患及人工流产因素。对照组为同厂不接 The authors investigated the spontaneous abortion rate of women workers exposed to mixed benzene (benzene, toluene, xylene) in a shoe factory in October 1986. The contact group consisted of 71 female workers with the average age of 30.5 years ~ 34 years old), more than 5 years of service. All 71 female workers were pregnant after being exposed to mixed benzene. During the pregnancy, they continued to work in their original positions except for the history of teratogenic drugs, the history of virus infection, reproductive system diseases and abortion during pregnancy. Control group is not connected with the same plant