Autism spectrum disorder (ASD) is characterized, in varying degrees, by difficulties in social interaction, verbal and nonverbal communication and repetitive behaviors. ASD can be associated with intellectual disability, difficulties in motor coordination, attention and health issues such as sleep and gastrointestinal disturbances. Although autism appears to have its roots in very early brain development, the most obvious clinical signs and symptoms of autism tend to emerge between 2 and 3 years of age.

All autism disorders are now merged into one umbrella diagnosis of ASD. Previously, they were recognized as distinct subtypes, including autistic disorder, childhood disintegrative disorder, pervasive developmental disorder-not otherwise specified (PDD-NOS) and Asperger syndrome. Early intervention can improve outcomes.

Overview For Parents

Overview For Clinicians