The rising prevalence of autism is not leveling off, according to a new study that accounts for every diagnosis made in Denmark over 32 years.

New and improved autism screens and diagnostic tools promise to streamline the long path to an autism diagnosis.

A recalibrated version of a widely used test for autism may accurately reflect autistic children’s development as they grow and become verbal.

In “The Boy Who Loved Too Much,” a woman tries to cocoon her son, who has Williams syndrome, from life’s insults but later realizes her protective instincts carry dangers of their own.

Routine screening of toddlers for autism in China could lead to much earlier diagnosis of the condition.

Two novel algorithms that analyze where a child looks as she views a video could help clinicians spot autism.

A remote Colombian town is home to the world’s largest cluster of people with fragile X syndrome. Scientists are learning from them — and trying to help.

The accepted wisdom in autism research holds that early intervention offers the best promise for an autistic child’s well-being. But how effective are these therapies?

The network of researchers keeping tabs on autism prevalence in U.S. children plans to follow up with some of those children in adolescence.

Autism and post-traumatic stress disorder share many traits, but the connection between them was largely overlooked until now.