In the third month of pregnancy, most pregnant women do not yet need regular calcium supplementation, and it is generally recommended that calcium supplementation can be started from 16 weeks. Pregnant women’s demand for calcium is relatively large, calcium supplementation can not only promote the growth and development of the baby, but also reduce the probability of pregnant women to develop gestational hypertension. If pregnant women are taking calcium tablets during pregnancy, it is recommended to take calcium carbonate or calcium acetate is better. These calcium are more easily absorbed, conducive to the growth and development of the fetus, generally recommended to eat 1-2 times a day. To the late stage of pregnancy, if the pregnant woman has cramps this more obvious symptoms of calcium deficiency, you can also increase the intake of calcium appropriately. In addition to eating calcium, you can drink some milk and eat some shrimp can also help to replenish calcium.