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人类新生儿中有3～7%是需要矫治的畸形。国外一些工业城市特别是化学工业城市中畸胎儿发生率比其它城市明显地高些。近年来在我国某些大城市儿童死亡原因中,先天性畸形跃居首位,传染病只占很小比例。所以,对化学物(包括药物)
3 to 7% of human newborns are deformities that require correction. In some foreign industrial cities, especially in chemical industrial cities, the incidence of teratogenesis is significantly higher than that of other cities. In recent years, some major cities in China, the cause of death of children, congenital malformations ranked first, only a small proportion of infectious diseases. Therefore, the chemical (including drugs)