A new resource that details the ages at which children attain milestones such as speaking and walking could help clinicians spot autism sooner.

At least one in three autistic children has significant movement difficulties, according to a large study.

Mutations in the gene CSDE1 lead to a constellation of developmental delays and conditions, including autism, according to a new study.

An experimental drug tamps down the expression of a gene duplicated in an autism-related condition and restores typical behavior in mice.

Mice lacking one copy of a gene called DDX3X have developmental delay and sensory, motor and behavioral problems — similar to those seen in people with a mutation in the gene.

A single dose of cannabidiol, a component of marijuana, eases seizures and improves learning and sociability in mice with mutations in an autism gene called CDKL5.

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.