The precautions to be taken during pregnancy mainly include screening for diseases and learning related knowledge, and the methods to nourish the fetus include dietary, psychological, living habits and environmental health care. 1. Disease screening: In order to prevent birth defects, serologic screening for Down syndrome, non-invasive prenatal testing technology, ultrasound screening for fetal structural abnormalities and other tests are required. 2. Learning related knowledge: such as learning about prevention of miscarriage, nutrition and lifestyle, self-monitoring of pregnant women, labor and puerperium, prenatal screening and preventive vaccination for breastfeeding. 3. Diet: Supplementing folic acid or its multivitamins three months before pregnancy can significantly reduce the risk of fetal neural tube malformation and congenital heart disease. During pregnancy, it is necessary to quit smoking and drinking, strengthen nutrition, and supplement iron, calcium and other minerals. 4. Psychological aspects: regular psychological assessment during pregnancy, so that pregnant women are ready to be a mother’s psychological preparation, if found pregnant women need to seek timely medical treatment for depression. Fetal growth and development in late pregnancy leads to weight gain, in order to relieve anxiety, family members need to give considerate care, to avoid pregnant women affected by stimulation and pressure, to prevent the occurrence of psychological problems during pregnancy and postpartum. 5. Lifestyle and environment: monitor fetal movement and contractions during mid- to late-pregnancy, ensure adequate sleep, appropriate activities, and avoid high-intensity work, noise and domestic violence in the living environment. If there is any special discomfort during pregnancy, consult a doctor promptly.