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How early do signs of childhood autism show up?

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Some children who are on the spectrum start showing signs as young as a few months old. Others seem to have normal development for the first few months or years of their lives and then they start showing symptoms.

But up to half of parents of children with ASD noticed issues by the time their child reached 12 months, and between 80% and 90% noticed problems by 2 years.

From: What Are the Symptoms of Autism? WebMD Medical Reference

SOURCES:

CDC: “Autism Spectrum Disorder (ASD).”

National Autism Association: “Signs of Autism.”

Mayo Clinic: “Autism spectrum disorder.”

Autism Speaks: “Symptoms.”

Reviewed by Roy Benaroch on November 18, 2016

SOURCES:

CDC: “Autism Spectrum Disorder (ASD).”

National Autism Association: “Signs of Autism.”

Mayo Clinic: “Autism spectrum disorder.”

Autism Speaks: “Symptoms.”

Reviewed by Roy Benaroch on November 18, 2016

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What are the social symptoms of autism?

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