7~9 months belongs to the third trimester, and the demand for energy, protein and iron is further increased. Some staple foods, milk, fish, poultry, eggs, lean meat and iron-containing foods can be appropriately added.

After 7~8 months of pregnancy, the fetus enters a period of rapid growth and development, and the nutritional needs are further increased. Attention should be paid to the following items in diet:

1. Appropriately increase the sources of high-quality protein such as fish, poultry, eggs and lean meat, and increase the protein intake to about 85g in the third trimester. You need to eat 3 ~ 4 pieces of lean meat (or fish, shrimp and poultry), 1 egg and 300~500ml of dairy products every day to ensure protein's intake.

2. The demand for calcium is consistent with the second trimester of pregnancy. At least 300 ~ 500 g of milk and half a catty of green leafy vegetables should be consumed every day to meet the calcium demand.

3. The demand for iron in the third trimester is further increased. Add 20-50g red meat every day, eat animal viscera or blood 1-2 times a week, and if necessary, supplement iron under the guidance of a doctor.

4. Deep-sea fish contain more docosahexaenoic acid, which contributes to the development of fetal brain and retina. It is recommended to eat 2 ~ 3 times a week.

5. The recommended intake of iodine during pregnancy is 230μ g/d. In addition to insisting on iodized salt, pregnant women should also consume 1 ~ 2 times of iodine-rich seafood every week, such as kelp and laver.