The first three months of pregnancy should pay attention to balanced nutrition is conducive to fetal development, the specific food has no special requirements and restrictions. Early pregnancy meals are light and palatable, easy to digest and conducive to reducing pregnancy reactions, including a variety of fresh vegetables and fruits, soybean products, fish, poultry and eggs, as well as various types of cereal products. The number, type and time of meals should be adjusted according to the appetite of the pregnant woman and the severity of the reaction, and the number of meals should be small to ensure the amount of food. Ensure adequate intake of carbohydrate-rich foods. Early pregnancy should ensure that the daily income of at least 130g of carbohydrates, preferred easy to digest grains and cereals; due to the severe reaction of pregnancy and can not normally eat enough carbohydrates of pregnant women should consult a doctor in a timely manner, to avoid adverse effects on the early brain development of the fetus, at this time do not have to over-emphasize the balanced diet. Consume more folic acid-rich food and supplement folic acid. Folic acid deficiency in early pregnancy may increase the risk of neural tube malformation and preterm delivery. Pregnant women should start planning their pregnancy by consuming more folic acid-rich animal offal, dark green vegetables and beans, and are advised to take an additional 400-800ug of folic acid daily. Quit smoking and prohibit alcohol. Nicotine in tobacco and carbon monoxide cyanide in smoke can lead to fetal hypoxia and malnutrition, developmental delay, and alcohol can also pass through the placenta into the fetus, resulting in intrauterine dysplasia and abnormal development of the central nervous system.