Summary: Expectant mothers should pay attention to calcium supplementation during pregnancy, which is very important for the health care of pregnant women and the healthy development of the fetus. However, mothers should not forget that calcium supplements are needed during every pregnancy, so as to fully ensure the \”win-win\” of the bones of mother and baby! Pregnant mothers need 1000-1200 mg of calcium every day. When there is insufficient calcium, the mother will break down bone calcium by herself.