The precautions for the first trimester of pregnancy are: 1. regular work and rest, do not stay up late, go to bed early and get up early, keep your mood happy and avoid straining. 2. reasonable diet, balanced nutrition, food should include milk, fish, meat, fruits, vegetables, etc., light and not greasy. 3. do not take drugs casually, avoid contact with toxic substances and radiation. 4. take oral folic acid tablets 0.4mg daily until the third trimester. 5. no intercourse in the first three months of pregnancy. 6. 6.Go to the hospital for the first maternity checkup and establish a health record. 7.Go to the hospital when abdominal pain, redness and other uncomfortable symptoms occur.