Pregnant women’s leg pain is not necessarily caused by calcium deficiency, although the lack of calcium during pregnancy can cause leg pain, and even lead to cramps and so on. But leg pain is not necessarily caused by calcium deficiency, leg pain during pregnancy may also be the following reasons: 1, more common is lumbar disc protrusion, with pregnancy so that the weight of the abdomen gradually increased, the risk of lumbar disc protrusion will also gradually increase. Once a lumbar disc herniation is formed, it may lead to painful symptoms in the legs. 2. Pregnant women with leg pain during pregnancy may also be caused by sports injuries. Because the amount of exercise after pregnancy drops sharply, so the quality of the leg muscles will also decline rapidly, when the weight increases, daily walking can lead to the formation of damage to the leg muscles, and trigger the symptoms of leg pain.