The importance of calcium supplementation for pregnant women. Pregnancy is a critical period for fetal growth and development. Sufficient calcium supplementation by the mother is beneficial to fetal bone formation, metabolism during pregnancy and the health of the pregnant woman herself. Calcium supplementation for pregnant women plays an important role in ensuring fetal bone development and maternal bone health. First of all, fetal bones need a large amount of calcium to support growth. If the calcium content in the pregnant woman\’s body is insufficient, the fetus will absorb the calcium reserves in the mother\’s bones to meet its own bone development needs. This will cause the mother\’s bones to be loose, fragile and brittle. Secondly, the body of pregnant women needs