The precautions to be taken before and after pregnancy mainly include reasonable diet, life adjustments and checkups. 1. Reasonable diet: There are many things to pay attention to before and after pregnancy, first of all, we should pay attention to increasing nutrition and eating reasonably. It is recommended to eat more folic acid-containing baby greens, carrots, tomatoes, mushrooms, oranges, strawberries, animal liver and other foods, but also eat more lean meat, eggs, fish, shrimp, milk and other high-protein foods to ensure balanced nutrition is conducive to preparation for pregnancy and eugenics. 2. Life regulation: 3 months before pregnancy, women should be appropriate amount of supplemental folic acid, and men also quit smoking and alcohol, avoid contact with radiation checks and harmful chemicals, etc., after pregnancy, we should rest, avoid exertion and sex, should not stay up all night and so on. Ensure sufficient rest time and a good state of mind, appropriate sports and exercise. 3. Examination: before pregnancy to do routine pre-pregnancy examination, women need to do routine leukorrhea, monitoring follicular development and ovulation, as well as mycoplasma, chlamydia, vaginal ultrasound, cervical cancer screening, etc., men need to do routine semen examination and routine physical examination. After pregnancy women should do regular blood HCG, progesterone and ultrasound and other tests. The matters to pay attention to before and after pregnancy are summarized as paying attention to regular healthy diet and life, doing relevant examinations, keeping a good mindset, and so on.