Every family and every parent wants to have a healthy baby. With the progress of medical science and technology, many congenital heart disease patients have been treated in time from childhood, so that they can grow up healthy, enter the society and get married and have children. They may worry about whether their children will suffer from congenital heart disease in the future, and I will talk about this issue below. In the general population, the incidence of precocious heart disease ranges from 0.6% to 0.8%. However, the incidence of preexisting heart disease increases if one parent has preexisting heart disease or if a sibling of the affected child has preexisting heart disease. The statistics are as follows: if one child has prediabetes, the chance of having another child with prediabetes is 1.5% to 5%, depending on the type of prediabetes in the previous child; if two children have prediabetes, the chance of having another child with prediabetes is 5% to 10%; if the mother has prediabetes, the chance of having a child with prediabetes is 2.5% to 18%, with an average of If the father has prediabetes, the chances of the child having prediabetes are 1.5% to 3%; these are only statistics from the literature. If there is a family history of prediabetes, it is recommended to monitor the development of the heart by fetal ultrasound around 18 to 20 weeks of pregnancy. The examination must be done by an experienced physician. Which hospitals have experienced ultrasound doctors and cardiac surgeons have the most say, so you can go to the cardiac surgeon to find out.