Pregnancy and fluorine in hard tissues: A preliminary report

Abstract

The mean fluorine content of the bones and teeth of pregnant rats was in most cases lower than that of non-pregnant animals. This result was obtained when using distilled water and tap water (the latter containing approximately 0.3 ppm fluorine) as a constituent of the diet. It is suggested that the need of fluorine of the growing foetus is related to the lowered values and that a release of fluorine would occur to some extent from the maternal hard tissues.