It can be taken at any time when there is calcium deficiency after pregnancy. After pregnancy, the demand for nutrition increases. If you do not pay attention to calcium supplementation at this time, calcium deficiency is likely to occur, affecting the development of the fetus. If there is calcium deficiency after pregnancy, you need to take calcium supplements immediately. If there is no calcium deficiency, you can start taking calcium supplements seven months after pregnancy. Calcium tablets are suitable for taking after meals. When taking calcium supplements after pregnancy, you should also pay attention to vitamin D, which can promote the absorption of calcium. Usually, we should eat more calcium rich food, and pay attention to basking in the sun.