Plugging a leaky mitochondrial membrane may help fragile X neurons to mature and function more efficiently.

Autistic people and their families are increasingly experimenting with marijuana to try to ease problems such as insomnia, epilepsy and chronic pain — and traits of autism. But there is little evidence for its safety or effectiveness.

Mice missing the autism gene NLGN3 have altered social behaviors and brain responses to the hormone oxytocin, both of which improve after treatment with a drug that helps regulate protein production.

Repeating bits of the genome may be responsible for nearly 3 percent of the genetic architecture of autism.

A new treatment prevents seizures and improves memory in a mouse model of fragile X syndrome, according to a new study.

Standardized tests can reliably assess memory, language ability, executive function and other traits in people with intellectual disability linked to autism.

A new blood test can identify within seven hours whether a person carries the genetic mutation underlying fragile X syndrome.

For people with fragile X syndrome, progress in daily living skills and behavior tends to stall later in life.