The onset of congenital heart disease usually occurs around 5 to 8 weeks of pregnancy and is not usually passed on to the next generation. The vast majority of children with congenital heart disease are caused by the environment. Pregnant women who have taken some medications during pregnancy and have been infected by viruses may cause the heart of the fetus to be underdeveloped, especially in the first trimester of pregnancy, once infected with rubella virus, then the probability of the child suffering from heart disease will be increased. Nowadays, congenital heart disease is rare, mainly due to the fact that the examination technology is more and more advanced nowadays, and more attention is paid to the examination of the fetus, such as atrial septal defect and arterial catheterization, etc. The changes of the heart ultrasound should be carefully observed after birth, and then surgery will be carried out, which usually chooses the blockage and open-heart surgery. Parents with congenital heart disease usually do not pass it on to the next generation. If you are not sure you can have your baby checked for heart problems after birth to ensure healthy development.