The first trimester of pregnancy is a critical period for the development of the baby, adequate supply of nutrients can help ensure the healthy development of the baby, what should be eaten in the first trimester of pregnancy, 1, the intake of protein diet is necessary, can provide high-quality protein food mainly includes fish, meat, milk, eggs, chicken, beef, etc. 2, a variety of vitamin nutrients are also essential, vegetables and fruits are rich in vitamin nutrients. The vegetables and fruits are rich in vitamins and nutrients. In early pregnancy, if there is no obvious vomiting reaction, the intake of fresh fruits and vegetables can be increased appropriately. 3, high quality fatty acids and various mineral nutrients are indispensable for the physical and intellectual development of the baby. Walnuts, peanuts, batanas, cashews and other nuts, rich in high-quality fatty acids and calcium, iron, phosphorus, magnesium, copper and other mineral nutrients, pregnancy should be moderate intake.