During the first three months of pregnancy, you need to take 1.2 grams of calcium per day. Milk is rich in calcium, and 1 kg of milk contains 1.2 grams of calcium. Generally, pregnant women who are pregnant with their first child do not have calcium deficiency, and the newborn baby will not have calcium deficiency. However, in late pregnancy, some pregnant women experience lower limb cramps, which are symptoms of calcium deficiency. After 20 weeks of pregnancy, you should pay attention to calcium supplementation. The way of calcium supplementation can start from the following 3 aspects. 1, milk: one cup each morning and evening, need to drink pure milk. Anhui Provincial Maternal and Child Health Hospital, Department of Gynecology, Zhou Shuguang 2, bone soup, shrimp, fish. 3, vitamin D chewable tablets, compound amino acid chelated calcium capsules can promote the absorption of calcium. The best time to take calcium supplements: before bedtime and after dinner. Things you should eat during pregnancy: fish, spinach, lotus seeds, milk, lean meat, oranges, whole wheat bread, dark green leafy vegetables, corn, sweet potatoes, brown rice, kelp. Things you should not eat during pregnancy: coffee, tea, chocolate, alcohol, cola, MSG, chili, ginseng, cinnamon, canned food, hot pot, doughnuts, etc. It is also best to avoid crab, turtle, pickled vegetables, pig liver, cold and spicy foods.