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Placental Transfer of Fluoride and Tin in Rats Given Various Fluoride and Tin Salts

Fetal fluoride and tin levels. Two-way analysis of variance of the values for animals fed salts containing fluoride indicated that the variable of test salt did not have a significant effect on fetal fluoride level (P > 0.25). However, the dietary level of fluoride had a highly significant effect (P << 0.01 ) on the fetal level of fluoride. The fetuses of rats fed the 200 ppm fluoride diets had significantly (P < 0.05) higher fluoride levels than the fetuses of rats fed diets with 0,