There are two main categories of birth defects.
Structural birth defects are related to a problem with body parts and structure. These can include:
Functional, or developmental, birth defects are related to a problem with how a body part or body system works. These problems often lead to intellectual and developmental disability (IDD) and can include:
In some cases, birth defects are caused by a combination of factors. Some recognized patterns of birth defects affect many parts or processes in the body, leading to both structural and functional problems.
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