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A member asked:

What are causes of atrioventricular septal defect?

A doctor has provided 1 answer

Unknown: The heart is a very complex organ. We still do not fully understand how the normal heart develops in the fetus. We understand even less about what causes the heart to develop abnormally. It is likely that there are multiple genetic and environmental factors that contribute to abnormal cardiac development.

Answered 1/2/2014

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