Autism
is a neurodevelopmental disorder characterized by impaired
social interaction, verbal and non-verbal communication,
and restricted and repetitive behavior. Parents usually
notice signs in the first two years of their child's life.
These signs often develop gradually, though some children
with autism reach their developmental milestones at a normal
pace and then regress. The diagnostic criteria require that
symptoms become apparent in early childhood, typically before
age three.
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