Autism spectrum disorder, or ASD, is the clinical name for the condition most people refer to as autism. Autism is defined as "a complex developmental condition that affects communication, social ...

More than one in 100 people are believed to be autistic. Here we look at what it is, how it is medically diagnosed and how it can make people feel.

Autistic regression refers to a loss of previously acquired skills or a backtracking of developmental milestones. In young children, it may represent autism onset. In older children and adults, it may ...

Clinicians and researchers continue to push back on unsupported claims about the causes of autism while new NIH projects aim to clarify its complex origins.

A diagnosis of autism spectrum disorder (ASD), or autism, involves one of three levels. Standards for the three types of ASD are listed in the Diagnostic and Statistical Manual of Mental Disorders, ...

Fragile X syndrome (FXS) and autism spectrum disorder (ASD) sometimes occur together. While FXS is a known genetic cause of ASD, not everyone who receives an FXS diagnosis is autistic, and not all ...

Currently, 1 in 36 children are diagnosed with autism spectrum disorder. During his confirmation hearings two weeks ago to lead the Department of Health & Human Services (HHS), Robert F. Kennedy Jr.