What is the cause of hand numbness during sleeping in pregnant women

Pregnant women sleep numbness, may be caused by calcium deficiency, may also be caused by edema, there may be caused by sleep posture pressure. Pregnant women are easy to show calcium deficiency, so it is generally recommended to start calcium supplementation from four months. But poor calcium absorption is also a more obvious problem, because pregnant women often lack exercise, but also lack of sun exposure, so calcium absorption utilization rate is not high, easy to show calcium deficiency. Calcium deficiency may cause hand numbness, waist acid, foot cramps and other performance, but also affect sleep. In addition, there will be more or less edema in the third trimester of pregnancy, some people show it as recessive, some people show it as dominant, edema will also make hand numbness.