作者研究镉进入大鼠体内对其胚胎毒性的剂量-效应关系。对已受孕6～15天的大鼠,分别给以含Cd~(2+)1.2、3.5、12.5 mg/kg和经口管饲含Cd~(2+)1.8、6.1、18.4、61.3 mg/kg的两种饲料。镉对母鼠的毒性作用:用饲食含镉饲料的各实验组及经口管饲镉剂量为18.4 mg Cd/kg/天的实验组,未发现有何影响,但是经口管饲6.1 mg Cd/kg/天的实验组,少数存活的 The authors investigated the dose-response relationship of cadmium into embryos in rats. Rats with 6 ~ 15 days of conception were treated with Cd 2+ (2+) at 1.2, 3.5 and 12.5 mg / kg and oral gavage with Cd 2+ (1.8, 6.1, 18.4 and 61.3 mg / kg of two kinds of feed. Toxicity of cadmium to maternal mice: No effect was observed in experimental groups fed diet containing cadmium and experimental groups receiving oral doses of cadmium at 18.4 mg Cd / kg / day, but oral gavage administration of 6.1 mg Cd / kg / day experimental group, a few survived