The first trimester of pregnancy can eat an egg every day to supplement protein and iron, which is beneficial to the development of the fetal brain, if you can adhere to a walnut every day, which can strengthen the elasticity of cerebral blood vessels and promote the vitality of nerve cells, appropriate intake of soy products, milk, poultry, meat to supplement calcium to meet the development of fetal bones. Then there are more fruits and vegetables rich in vitamin C such as kiwi, oranges, apples, spinach and so on. It is best not to eat cold or too warm food such as crab, watermelon, cinnamon, lychee, etc. during the third trimester of pregnancy. In short, the diet of the early pregnancy is based on reasonable nutrition, meat and vegetables, coarse and fine. Eat less and more meals, reasonable meals and balanced nutrition. It is recommended to take enough folic acid in the third trimester to prevent fetal cerebrovascular malformation.