Congenital heart diseases in parents -> what risk in fetuses?

One~4%both~6-8: Chd is polygenic= influenced by multiple genes and not directly passed on. The type of the parents chd is not necessarily one seen in the offspring.

Roughly 2-3%: The most commonly quoted number is that for every 1, 000 babies born approximately 8 will have some form of congenital heart disease (chd). When a parent has chd the chance of offspring having heart disease will vary depending on which parent is affected (mom or dad) and what defect is present but a good general average is 2-3% chance (meaning there is a 97-98% chance of no heart disease).