Journal
JOURNAL OF VETERINARY MEDICAL SCIENCE
Volume 69, Issue 4, Pages 441-443Publisher
JAPAN SOC VET SCI
DOI: 10.1292/jvms.69.441
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The effects of vitamin D (VD) deficiency on calcium (Ca) metabolism during pregnancy were evaluated in rats fed VD-repleted (VD-repleted rats) and VD-depleted (VD-depleted rats) diets. In the VD-depleted rats, the plasma concentrations of 1,25-dihydroxyvitamin D and Ca decreased severely, whereas the parathyroid hormone concentrations increased. The Ca contents of the feces of the VD-depleted rats were higher than those of the VD-repleted rats. The fetal Ca contents of the VD-repleted and VD-depleted rats increased continuously, but that of the VD-depleted rats was lower. These data reveal that VD deficiency during pregnancy induces severe hypocalcemia due to reduced intestinal absorption of Ca and elevated fetal demand for Ca.
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