Congenital heart disease is the number one birth defect disease in China, and congenital heart disease has become the number one killer of newborns and a heavy burden to families and society. Here, we will tell the pregnant mamas how they should avoid having a baby with congenital heart disease. A, the key to the prevention of precocious heart disease in pregnancy The main causes of precocious heart disease can be divided into environmental factors and genetic factors, mainly caused by a variety of factors, especially now the aggravation of environmental pollution, advanced pregnancy, etc. intensify the occurrence of such diseases. There are five main aspects: 1, family history of congenital heart disease; 2, pregnant women with diabetes; 3, viral infection or exposure to teratogenic drugs in early pregnancy; 4, exposure to radioactive substances in early pregnancy; 5, consanguineous marriage; 6, excessive mental stress, etc. Therefore, pregnant women should pay attention to these during pregnancy to avoid their babies suffering from precocious heart disease. Early prevention is the key Second, avoid bad habits Throughout pregnancy, pregnant women should change all bad habits, do not smoke and do not drink. Avoid malnutrition and overnutrition. During pregnancy, the diet of pregnant women is also very important. Both malnutrition and overnutrition can increase the chance of congenital heart disease. Malnutrition can make the baby’s body not strong enough, and overnutrition can cause digestive difficulties for pregnant women. Third, avoid contact with toxic substances and radiation Pregnant mothers should avoid breathing harmful substances during pregnancy, try to minimize exposure to radiation, electromagnetic radiation and other adverse environmental factors, at the same time, to use computers and cell phones less. Fourth, use drugs as little as possible Strengthen pregnancy health care, especially in early pregnancy to actively prevent rubella, influenza and other rubella viral diseases. In addition, pregnant women should avoid taking drugs as much as possible, and if they must use them, they should do so under the guidance of a doctor. V. Do regular maternity checkups After 22 weeks of pregnancy, pregnant mothers must go to the hospital to check the baby’s heart condition and achieve early diagnosis. Some precordial diseases can be treated in the fetal stage, so early detection can be treated as early as possible. The stability of the pregnant woman’s mind during pregnancy is also a very important part of the prevention of precocious heart disease. According to a study by the University of Sussex, if a woman is emotionally volatile and irritable during pregnancy, her baby’s heart rhythm will change relatively little after birth, so that the baby’s chances of suffering from heart disease will be greater. Seven, how to detect precocious heart disease during pregnancy Nowadays, ultrasound technology is developing rapidly and new science and technology are constantly applied in the clinic, a skilled ultrasonographer can detect some heart abnormalities at 18 weeks of pregnancy. An ultrasound examination of systemic malformations and congenital heart disease at 22-24 weeks of pregnancy can find out whether the fetus has fatal defects in the heart. This is the best time to do congenital heart disease screening as the fetus reaches a certain level of growth and the heart shows the best images.