A saliva test that helps clinicians diagnose autism is expected to be available in the next few weeks. But some experts are skeptical of the test’s accuracy and value.

In the final installment of Graeme Simsion’s bestselling Rosie trilogy, the protagonist’s implied autism becomes explicit — and leaves our reviewer cold.

Less than 1 percent of young children in northern Vietnam have autism, but this prevalence is higher than in previous reports.

Watch the complete replay of our roundtable on camouflaging in autism.

Autistic infants who are enrolled in long-term studies may go on to have milder autism traits and better life skills than other children with the condition.

The relatives of autistic people often have mild traits of the condition. Studying these family members could broaden our understanding of autism.

Clinicians can reliably diagnose autism roughly two years earlier than the typical age of diagnosis.

Autism’s prevalence in Northern Ireland is climbing, but government policies leave families unable to access the treatments they need.

The ratio of autistic boys to girls is roughly the same among children with epilepsy, according to a new meta-analysis.

A national survey that estimates autism prevalence includes too few black families to yield accurate data for that demographic.