Autism spectrum disorder - Symptoms and causes - Mayo Clinic
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 getting along with others socially. The condition also includes limited and repeated patterns of behavior.

Autism - Wikipedia
Autism is primarily characterized by differences and difficulties in social interaction and communication, alongside restricted or repetitive patterns of interests, activities, or behaviors (stimming), and, in many cases, distinctive reactions to sensory input.

Signs and Symptoms of Autism Spectrum Disorder
Learn about the signs and symptoms of ASD.

Autism: Symptoms, Causes, Types, and Testing - WebMD
Autistic disorder. This is what most people think of when they hear the word "autism." It affects social interactions, communication, and play in children younger than 3 years.

Autism spectrum disorder (ASD) | Autism Speaks
Anybody can be autistic, regardless of sex, age, race or ethnicity. However, research from the CDC says that boys get diagnosed with autism four times more often than girls.

Autism Spectrum Disorder (ASD) Symptoms & Causes
Autism (autism spectrum disorder, or ASD) is a difference in how your child’s brain works that shapes their behaviors, interests, social interactions and ways of communicating. ASD falls under the umbrella of neurodevelopmental disorders.

What is autism? - NHS
Autism is something you’re born with. It’s not an illness and there is no treatment or cure, but there are ways of managing it and getting support. It’s not known what causes autism, but it can sometimes affect people in the same family. It is not caused by vaccines or medicines.

Signs and Characteristics of Autism in Adults - Verywell Health
Key Takeaways Autistic people may have an unusual pattern of nonverbal communication. Autistic adults often have strong preferences for routines and can become stressed if routines change. Autistic adults may have intense responses to sensations like fabrics or smells.

What is autism - National Autistic Society
Autism influences how people experience and interact with the world. It is a lifelong neurodivergence and disability. Autistic people are different from each other, but for a diagnosis they must share differences from non-autistic people in how they think, feel and communicate.

About Autism Spectrum Disorder | Autism Spectrum Disorder (ASD) | CDC
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 causes are not yet known. Scientists believe there are multiple causes of ASD that act together to change the most common ways people develop.