The signs of calcium deficiency in pregnant women vary from person to person, not necessarily 10 manifestations, usually mainly in the form of cramps, may also appear as muscle pain, back pain and so on. The blood volume of pregnant women increases during pregnancy, which may lead to the gradual dissolution of calcium in the bones, and at the same time, the fetus will continue to take calcium from the pregnant woman’s body, so the pregnant woman’s body will lose a lot of calcium during pregnancy, which causes calcium deficiency in pregnant women, which may cause symptoms such as cramps, muscle aches and pains, weakness of limbs, numbness of the hands and feet, grinding of teeth, and night sweats (sweating abnormally after going to sleep, and the sweating stops after waking up). Pregnant women themselves are prone to calcium deficiency and usually need to take calcium supplements in mid-pregnancy. However, if symptoms related to calcium deficiency occur in early pregnancy, calcium and vitamin D supplements can also be taken under the guidance of a doctor in a timely manner. In addition, it is recommended that pregnant women consume more high-calcium foods and sunbathe appropriately to promote the absorption of calcium.