If congenital heart disease is suspected, most congenital heart disease is associated with viral infection during the mother’s pregnancy and exposure to toxic and physical and chemical factors. It is generally recommended that a major cardiac screening be performed around the fifth month of pregnancy, and a 4D ultrasound of the heart can be used to screen for congenital heart disease. It is also recommended that during pregnancy, especially in the early stages, the mother should try to avoid viral colds, have balanced nutrition and emotional stability, take proper rest, don’t stay up late, don’t eat stimulating food, don’t drink coffee or strong tea, which are unfavorable factors for the development of the child, and avoid exposure to lead and toxic substances, and also avoid exposure to radioactive substances, all of which can help prevent the child from developing congenital heart disease.