Female rats were given 25 ppm fluoride as various fluoride compounds during gestation or 25 ppm fluoride as NaF during gestation and a pregestational period. Offspring were killed at birth and analyzed for fluoride. Fluoride compounds given during gestation resulted in comparable amounts of fluoride in the offspring, but a greater amount was observed in pups whose mothers received ZrOGeF6. Pregestational fluoride exposure increased the amount of transplacental fluoride transfer.
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