Some children with autism carry harmful mutations in the DNA found in mitochondria, the cell’s energy producers.

Exposure to influenza and a lack of sunlight may drive the increased risk of autism.

DNA deletions and duplications tied to autism crop up in people without the condition, too.

A set of seven standard tests can accurately assess cognitive capacities in people with various types of intellectual disability.

Mice with either too little or too much MeCP2, the gene mutated in Rett syndrome, show similar malfunctions in a learning and memory circuit.

An inexpensive new set of tests allows researchers to rapidly analyze the genetic glitch underlying fragile X syndrome.

Watch the complete replay of Maureen Durkin’s webinar, in which she discussed the epidemiology of autism and intellectual disability, including changes in the prevalence of each condition.

Nearly half of children with autism who speak few or no words have cognitive skills that far exceed their verbal abilities.

Hillary Clinton releases an expansive mental health care agenda; researchers call for autism research in sub-Saharan Africa; and a scientist alleges gender bias at the National Institutes of Health.

The first large population-based analysis of the prevalence of regression in autism reveals that it occurs in 20 percent of children with autism.