How is heart defect tied with genetics?

Answer:
Heart defects tend to run in families. So, a medical history is important. However, there are many other causes of heart defects - such as smoking, drinking, hot tubing, taking drugs/medicines during pregnancy. There are also many unknown causes of heart defects. More research is needed to discover these unknown causes.
First answer by HeartBabyHome. Last edit by HeartBabyHome. Contributor trust: 1 [recommend contributor recommended]. Question popularity: 1 [recommend question].

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