[Objective] To evaluate the reproductive toxicity to offspring rats induced by simazine exposure during early life stage. [Methods] A total of 90 female and 45 male SD rats were allowed to mate in stainless steel cages with two females and one male per cage. Eighty pregnant rats in good condition were selected and divided into eight groups. Four groups received different doses of simazine during gestation and another four groups did during gestation-and-lactation. Each four groups included 0 mg/kg(3% starch...