Autism, also known as autism spectrum disorder (ASD), [a] is a condition mainly characterized by differences or difficulties in social communication and interaction. It can also include a need or …

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

Autism Spectrum Disorder (ASD) is a developmental disability causing social, communication, and behavioral challenges.

Aug 6, 2024 · The causes of autism aren’t clear. But the symptoms are not hard to spot. The key often is watching for developmental milestones. Learn about the signs of autism.

Autism now affects 1 in 31 children About 40% of children with autism do not speak The rate of autism has steadily grown over the last three decades Comorbid conditions often associated …

Sep 17, 2025 · Autism – also referred to as autism spectrum disorder – constitutes a diverse group of conditions related to development of the brain. Characteristics may be detected in …

ASD is a complex developmental disorder that affects how a person behaves, interacts with others, communicates, and learns. NICHD is one of many federal agencies and NIH Institutes …