Autism, also known as autism spectrum disorder (ASD), [a] is a condition characterized by impairment in social communication and interaction, [4][1] as well as a need or strong preference for predictability …

May 22, 2025 · Overview 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 …

May 16, 2024 · Autism spectrum disorder (ASD) is a developmental disability caused by differences in the brain. People with ASD often have problems with social communication and interaction, and …

Sep 16, 2025 · Autism is a developmental disorder that appears within the first three years of life. Learn about presentations, diagnosis, and care.

Sep 17, 2025 · WHO fact sheet on autism with sections on epidemiology, causes, assessment and care, human rights and WHO's work in this area.

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

NHS information about autism. Find out what autism is and what the common signs are. Get help and advice if you or your child are autistic.

Apr 13, 2026 · 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 condition. Other …

Describes autism spectrum disorder (ASD): signs and symptoms; causes and risk factors; diagnosis in children, teens, and adults; and treatments.

What is autism? Autism is a difference in how your brain develops that affects how you see and experience the world. It is often called a type of neurodivergence. You might also hear autism called …