1. Start folic acid supplementation when you intend to get pregnant: According to large-scale medical studies, a daily supplement of 0.4 mg of folic acid from the first trimester to the third trimester (some experts now point to full-term folic acid supplementation) can reduce the chance of fetal neural tube defects (including anencephaly, brain bulge and spina bifida) by 40-80%, which is one of the few preventable congenital malformations, including intrauterine This is one of the few preventable congenital malformations, including intrauterine stillbirth. Treatment of maternal diseases: Many chronic maternal diseases, such as hypertension, diabetes or thyroid abnormalities, can increase the chances of fetal death, so relevant tests should be performed before pregnancy, and if such problems are found, they should be treated before pregnancy. 3, avoid environmental toxins: pregnant women should not smoke, alcohol, pregnant women should also avoid taking drugs without a doctor’s prescription. As for drugs such as heroin, it can also lead to fetal death. Pollutants or toxins in the environment, such as PCBs and Dioxin, can also cause fetal death. All these conditions should be avoided as much as possible. 4, adjust work and rest: many studies have found that excessive workload can increase the chances of premature birth, miscarriage, stillbirth and other growth retardation, so pregnant women should adjust their work and rest, to have sufficient rest. 5, on time maternity checkups: pregnant women should follow the prescribed time maternity checkups, can be early detection of problems, such as gestational diabetes or gestational hypertension, and timely treatment, not only can the chance of fetal abortion and intrauterine stillbirth, but also to ensure the safety of the mother. 6, pay attention to prenatal education: prenatal education can provide information, so that pregnant women understand the physiological changes of pregnancy and should take precautions. Ignorance can lead to risks, for example, many pregnant women do not understand the harm caused to their babies by smoking or taking drugs indiscriminately, and are unaware of the danger signs of pregnancy. Attending various prenatal education in hospitals can provide various information and reduce the risk. 7. Pay attention to epidemic diseases: there are some infectious diseases that not only cause fetal abortion and intrauterine stillbirth, but also leave serious sequelae even if the fetus survives, such as German measles. Therefore, if you find out that you do not have antibodies to German measles before you get pregnant, you should get vaccinated before you get pregnant. If it is during pregnancy that you find no antibodies, try to avoid going to public places during the disease epidemic to avoid being infected. 8, pay attention to sex life: some sexually transmitted diseases, which can cause fetal death or major deformities, such as syphilis. Avoid multiple sexual partners or use condoms to avoid the transmission of sexually transmitted diseases. If an infection is found, it should be treated early.