Studies of Rett syndrome hint at genes, cells and brain circuits that may be involved in autism — and may pave the way to treatments for both conditions.

Deleting the mutation from an autism gene may reverse some autism traits in mice, according to a new study. But the results may be a fluke.

Like their neurotypical peers, autistic children like to eat macaroni and cheese, chicken nuggets, French fries and hot dogs, but their list of favorites holds some surprises.

The loss of 21 genes on chromosome 3 may substantially raise the risk of autism.

Researchers have engineered two generations of monkeys with mutations in SHANK3, a top autism gene. The first generation shows traits reminiscent of the condition.

About half of boys and men with fragile X syndrome injure themselves — and continue to do so for years.

Mice colonized with gut microbes from some autistic boys show behaviors like those of the boys.