The eighth month of pregnancy is the peak of fetal neurological development, and the cerebral cortex proliferates rapidly, which should be supplemented with sufficient unsaturated fatty acids to promote the development of the fetal nervous system. Fish, especially deep-sea fish, and nutty foods are rich in unsaturated fatty acids. In addition, after the eighth month of pregnancy, the fetus begins to store glycogen under the skin and under the liver, and as the fetus develops, its use of sugar gradually increases, and it is also necessary to supplement sufficient carbohydrates at this time; if the carbohydrate intake is insufficient, it will lead to protein deficiency and induce ketoacidosis. So special attention should be paid to the diet. In addition, the diet of the whole pregnancy period requires scientific, reasonable and balanced. That is, pregnant women should diversify their diet and eat eight types of food, cereals and potatoes, nuts, fresh vegetables, fruits, meat, milk, eggs, and fats and oils. For different pregnant women, appropriate nutritional guidance is given according to the body mass index. But late pregnancy should not be overly supplemented, because late pregnancy is also a period of high incidence of pregnancy complications, especially gestational diabetes, and if gestational diabetes occurs, 80-90% of people can be given proper treatment with diet and exercise.