Normal calcium metabolism during pregnancy is generally daily calcium needs of adults for 0.8-1.0 g. How much calcium supplementation in late pregnancy should be taken in accordance with the doctor’s instructions, and the actual number of grains to be taken should be decided according to the dosage of calcium tablets. The demand for calcium in late pregnancy is relatively large, on the basis of a normal diet can be supplemented with calcium preparations to make up for the lack of calcium during pregnancy. Diet can eat more food with high calcium content, such as shrimp, kelp, sesame and so on. Excessive calcium supplementation can have adverse effects on a person’s body, which may lead to hypercalcemia, resulting in high blood pressure, cardiac arrhythmia and other diseases. If excessive calcium supplementation is prolonged, it may also lead to kidney and ureteral stones, and in severe cases, kidney damage. If a pregnant woman does not have symptoms of calcium deficiency, such as fetal growth retardation, back and leg pain, etc., it is sufficient to ensure a normal dietary calcium intake, and there is no need to take additional calcium supplements. If there are obvious symptoms of calcium deficiency, follow the doctor’s instructions to determine the dosage of calcium supplementation. During pregnancy, pay attention to rest more, at the same time should be relaxed, avoid tension, anxiety, any discomfort should be timely to the hospital, the doctor for a clear diagnosis, and cooperate with the doctor to deal with the symptoms.