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  1. What is Autism? - Autism Research Institute

    What is Autism? Autism is a developmental disorder with symptoms that appear within the first three years of life. Its formal diagnostic name is autism spectrum disorder. The word …

  2. About Autism Spectrum Disorder | Autism Spectrum Disorder …

    Apr 14, 2025 · Autism spectrum disorder (ASD) is a developmental disability caused by differences in the brain. Some people with ASD have a known difference, such as a genetic …

  3. What is autism spectrum disorder? - Harvard Health

    May 22, 2025 · Autism spectrum disorder (ASD) is a complex neurological condition that affects how a person interacts, communicates, and experiences the world. Learn about its symptoms, …

  4. Autism spectrum disorder - Symptoms and causes - Mayo Clinic

    May 22, 2025 · Autism spectrum disorder is a condition related to brain development that affects how people see others and socialize with them. This causes problems in communication and …

  5. Autism: Symptoms, Causes, Types, and Testing - WebMD

    Sep 11, 2024 · Know about autism, including its symptoms, causes, types, and testing methods. Explore WebMD's comprehensive guide to better understand and manage autism.

  6. Autism Spectrum Disorder - National Institute of Mental Health …

    Learn about NIMH research on autism spectrum disorder. Find resources on the signs and symptoms of autism and potential treatments and therapies.

  7. Complete Guide to Autism - Child Mind Institute

    Feb 10, 2025 · A comprehensive look at autism, from diagnosis to special issues affecting autistic kids, like picky eating and sensory issues, and kinds of evidence-based interventions.

  8. Autism spectrum disorder (ASD) | Autism Speaks

    What is autism? Learn about autism spectrum disorder (ASD), the autism definition, a brief overview of co-occurring conditions and access helpful resources.

  9. Autism - World Health Organization (WHO)

    Sep 17, 2025 · Autism – also referred to as autism spectrum disorder ̶ constitutes a diverse group of conditions related to development of the brain. In 2021 about 1 in 127 persons had autism. …

  10. Autism Spectrum Disorder (ASD) Symptoms & Causes

    Oct 14, 2025 · Autism spectrum disorder (ASD) is the full medical name for autism. The DSM-5-TR defines ASD as a difference in brain functioning that affects how you communicate and …