Girls with autism may have more difficulty making and executing plans, and taking care of themselves, than do boys with the condition.

A component of marijuana called cannabidiol eases seizures in children with Dravet syndrome.

A drug that alters the balance of two key chemical messengers in the brain may help treat autism, suggests a proof-of-principle study.

A small clinical trial shows that treatment with the hormone oxytocin improves social skills in some children with autism.

A drug used to treat type 2 diabetes reverses behavioral and brain abnormalities in a mouse model of fragile X syndrome.

RNA segments that control when and where genes are expressed may be involved in autism.

Monkeys with a mutation in the Rett syndrome gene, MeCP2, have social difficulties and repetitive behaviors.