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.

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.

Autism spectrum disorder (ASD) | Autism Speaks
Developed by and for autistic adults, this guide can help you figure out what comes next. Find local providers and services in your area with the Autism Speaks Resource Guide.

What is autism spectrum disorder? - Harvard Health
Autism is a neurodevelopmental condition that affects a person's ability to communicate and interact with others, often involving challenges with starting and maintaining conversations, intense focus on special interests, and repetitive language or behaviors.

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.

Autism - World Health Organization (WHO)
The abilities and needs of autistic people vary and can evolve over time. While some people with autism can live independently, others have severe disabilities and require life-long care and support.

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.