The first trimester of pregnancy can be nourished through dietary regulation, drug application and other precautions. 1. Dietary regulation: the first trimester of pregnancy is the early stage of pregnancy, need to eat a nutritious diet, high protein and high vitamin diet, small meals. Avoid eating too much or consuming greasy food, which may cause nausea and vomiting and aggravate the early pregnancy reaction. 2. Drug application: If necessary, pregnant women should take oral folic acid tablets during the first trimester to prevent neural tube malformation. 3. Other precautions: Sex and strenuous exercise should be prohibited during early pregnancy. Ensure adequate sleep and appropriate activities. No smoking and no alcohol. Adopt good living habits. Regular pregnancy checkups during early pregnancy, if you need to use medication must be used under the guidance of a doctor, do not take medication on your own.