Calf cramps during pregnancy may be caused by a lack of calcium, which can be relieved by supplementing calcium-rich foods, taking vitamin D supplements, and reducing standing time. 1. Supplement calcium-rich foods: You can appropriately increase the intake of high-calcium foods such as dairy products, soybean products, shrimp, nori and so on. 2. Supplement vitamin D: Vitamin D can promote the body’s absorption of calcium, so pregnant women can consume more foods rich in vitamin D, such as meat, deep-sea fish, etc., and appropriate exposure to sunlight. 3. Reduce standing time: avoid standing for a long time, heavy load on legs can also stimulate calf cramps. Calf cramps during pregnancy have a variety of reasons, frequent cramps need to go to the hospital for examination, to clarify the cause of leg cramps after symptomatic treatment.