Abstract
Summary and Conclusions
Continuous feeding experiments with rats on a Sr90 labeled feed indicated that: (a) dietary calcium was utilized for bone growth by a factor of 3.6 over Sr90; (b) about 28.6% of the fetal calcium was derived from maternal calcium; (c) dietary calcium was utilized for bone formation in the developing fetus by a factor of 5.1 over Sr90; (d) this high factor for the fetus was accounted for on the basis that calcium and Sr90 released from the maternal skeleton were deposited in the fetus with the same selectivity of 3.6 for calcium as was observed for the growing rat.
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