In the first month of pregnancy, the baby is still unstable in the uterus, so a little carelessness may lead to miscarriage or pre-eclampsia, so pregnant women and their families must be extra careful at this time. The precautions for the first month of pregnancy usually include avoiding sex in early pregnancy, paying attention to supplemental nutrition, avoiding exposure to toxic environment, avoiding overwork, etc. 1. avoid early sex: because the stimulation of sex can lead to uterine contraction and cause miscarriage, so do not have intercourse in the first three months of pregnancy; 2. pay attention to supplemental nutrition: first of all, pay attention to supplemental folic acid to prevent the occurrence of neural tube malformations. Eat a diet rich in protein and vitamins, and easy to digest and absorb food. Avoid eating too spicy and stimulating, greasy, cold and cold food or drinks to avoid stimulating the intestinal tract of pregnant women and causing abdominal pain, diarrhea and induced contractions, and the phenomenon of pre-eclampsia or miscarriage; 3, avoid contact with toxic environment: stay away from drugs and unsafe toxic substances, such as radiation and second-hand smoke, etc., and do a good job of follow-up routine prenatal screening and prenatal diagnosis plan; 4, avoid excessive Exertion: ensure enough sleep, do not stay up late for a long time; avoid strenuous activities and weight bearing, pay attention to observe whether there is vaginal bleeding or abdominal pain, if there is discomfort, you should immediately seek medical attention. In addition, pregnant women will have some symptoms in the first month of pregnancy, such as menopause and early pregnancy reaction, so they should be prepared for them and have common sense during pregnancy. Early pregnancy reaction usually occurs at 6 weeks after menopause, with reactions such as cold, dizziness, weakness, drowsiness, lack of appetite, preference for acidic food, aversion to greasy food, nausea and vomiting, which usually disappear on their own in about 12 weeks; some pregnant women with more serious nausea and vomiting need to go to a regular hospital in time and use rehydration solution to replenish electrolytes.