Calcium supplements during pregnancy are usually taken until delivery, which is around 10 months. It is necessary for pregnant women to take calcium supplements during pregnancy. The demand for calcium is higher after pregnancy due to the growth and development of the fetus. Calcium supplements should be started in the fourth month of pregnancy and can be taken until the end of labor. If you still need to breastfeed after delivery, you can also continue to take calcium supplements to improve the quality of breast milk. Pregnant women should take folic acid supplements in the first three months of pregnancy, and calcium and iron supplements from the middle of pregnancy onwards. During pregnancy, you should also ensure the intake of vitamins, proteins, carbohydrates, trace elements, to ensure balanced nutrition, which can better help the growth and development of the fetus. In addition to nutrition during pregnancy, pregnant women should also pay attention to rest, maintain healthy work and rest habits, avoid labor, stay up late, to provide a healthy environment for the growth of the fetus. During pregnancy, you should also pay attention to the maternity examination, if there is any abnormality, you need to consult a doctor in time to deal with it.