Children with ‘severe autism’ are the most in need of help, yet the most overlooked in research. A new initiative is making them the primary focus.

Children with mutations in a gene called DYRK1A, a leading autism candidate, have a distinct set of features, including intellectual disability, speech delay, motor problems and a small head.

Taking prenatal multivitamins may reduce the risk of having a child who has autism with intellectual disability, another vaccine-autism link study is being retracted, and schizophrenia sometimes accompanies autism.

A new database details the genetic mutations associated with Phelan-McDermid syndrome, along with the behavioral outcomes of people with those mutations.

An epilepsy drug may prevent seizures in infants with tuberous sclerosis and alleviate their autism features, says Martina Bebin.

People with autism aren’t easily surprised, the social camouflage some girls and women with autism use may preclude diagnosis, and autism-related genes are rooted deep in human ancestry.

Researchers in Oregon edit human embryos, prenatal antidepressants may play a role in autism risk, and gut microbiota are associated with early cognition.

The odds of getting an autism diagnosis depend on where in the United States a person lives.

Children with tuberous sclerosis who have seizures as infants are particularly likely to also have developmental delay and autism features.

Two candidate genes have risen to the top, and may help scientists understand what autism really is.