The first trimester of pregnancy is a critical period for the growth and development of the baby’s organs, and the demand for various nutrients is relatively high, as follows: a. protein, protein is the basis of life, and is one of the most important nutrients in the development of the baby. In the first trimester of pregnancy, pregnant women should properly consume various high-protein diets and supplement protein nutrients, such as fish, poultry, lean meat, eggs and milk; second, various vitamins and minerals nutrients, although the demand for these nutrients is not much, but they are essential nutrients for the physical and intellectual development of the baby and the development of the nervous system. These nutrients are mainly provided by a variety of fresh vegetables, fruits, milk, eggs and other foods; third, linolenic acid, linoleic acid and other high-quality fatty acids, for the baby’s nervous system, skin, vision and other development are very important, mainly from a variety of nut foods and a variety of vegetable oils.