Eighty seven pregnant women belonging to poor socioeconomic groups of population were investigated to find out the effect of calcium supplementation during pregnancy on the bone density of the mother as well as of the neonate. Supplements of 300 and 600 mg of elemental calcium administered daily from the 20th week of gestation onward until term, brought about a significant increase in the bone density of the neonates born of such mothers compared to that of the neonates born to unsupplemented mothers. Although no significant difference was observed between the initial and final values for bone densities among the mothers, there was a tendency for an increase in the bone density of the mothers who received 600 mg of calcium supplements. Individual variation of different neonatal bones in their response to maternal calcium supplements was observed. Bone density of the neonate was not related to the birth weight, crown-heel, or crown-rump lengths.

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