All children have some laboratory tests at birth and as part of regular checkups. Children with autism spectrum disorder (ASD) often need more tests. These tests can help find the cause of the condition or problems related to it that may not be obvious. This helps guide your child’s doctor in treating your child best.

New genetic tests now make it possible to find a cause for ASD in many more children than before. Genetic testing can also give information about the chance of ASD in future children or for children of other family members.

The tests your child’s doctor asks for will depend on your child’s situation. Often, children with ASD have vision, hearing, and blood tests including genetic testing. If your child has seizures, your child’s doctor may ask for neurological tests, which are tests of the brain and nervous system. Your child’s pediatrician may send your child...

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