My parents are healthy and my sister is healthy. Why does my sister suffer from congenital heart disease?

The so-called congenital heart disease means that there is a problem with the heart development in the mother's body, and the symptoms of heart disease only appear after birth. This is related to many factors. On the one hand, it is genetic, such as exposure to radioactive substances, medication during pregnancy, eating some harmful foods, drinking and smoking. , are very complicated, not necessarily genetic. If there are no symptoms, don't worry too much, you can also go to the hospital for examination and elimination. Don't worry!