Pregnant women need to take calcium supplements after the third month of pregnancy, and those with combined anemia should also take iron supplements as prescribed by the doctor. With the increase of pregnancy weeks and the growth of the fetus, after the third trimester of pregnancy, under the guidance of the doctor should be appropriate to increase the protein-rich food, such as meat, eggs, fish, poultry and so on. Since almost all the calcium needed for fetal bone development comes from the mother, it is necessary to take calcium supplements and ensure 250-500g of dairy products under the guidance of the doctor. You should also eat iron-rich food, such as red meat, animal liver and blood, etc. If you have anemia, you should take iron supplements as prescribed by your doctor. After the third trimester of pregnancy, you should also do a moderate amount of moderate-intensity physical exercise under the guidance of your doctor, such as walking and yoga for pregnant women, which can ensure the appropriate weight gain during pregnancy and is also conducive to natural delivery. Because tobacco and alcohol have toxic effects on fetal development, you should also abstain from smoking and drinking.