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When do signs and symptoms of autism usually appear in children affected?

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Autism usually appears before a child is 3 years old. Some signs of autism may be evident as early as 10 to 12 months, and certainly by 18 months.

From: Parenting a Child With Autism WebMD Medical Reference

SOURCES: National Institute of Neurological Disorders and Stroke: "Autism Fact Sheet." National Mental Health Information Center: "Children and Adolescents with Autism." National Institute of Child Health and Human Development: "Autism Overview: What We Know" and "Autism research at the NICHD." National Institutes of Health: "Gene linked to autism in families with more than one affected child."  Centers for Disease Control: "Vaccines and Autism: Important Conclusions from the Institute of Medicine."




Reviewed by Smitha Bhandari on May 20, 2018

SOURCES: National Institute of Neurological Disorders and Stroke: "Autism Fact Sheet." National Mental Health Information Center: "Children and Adolescents with Autism." National Institute of Child Health and Human Development: "Autism Overview: What We Know" and "Autism research at the NICHD." National Institutes of Health: "Gene linked to autism in families with more than one affected child."  Centers for Disease Control: "Vaccines and Autism: Important Conclusions from the Institute of Medicine."




Reviewed by Smitha Bhandari on May 20, 2018

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What are signs and symptoms in children with autism?

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