Children who are born with mild heart problems are more likely to be autistic than their typical peers are.

Not much is known about the connection between autism and Ehlers-Danlos syndrome, a condition that affects collagen. But preliminary work provides tantalizing clues.

A molecule made by mitochondria, the energy factories of cells, might help doctors forecast the impact of mutations in a top autism gene.

Brain activity patterns in the first year of life may predict autism in infants at high risk for the condition.

Cardiac activity could reveal autism’s physiology and confirm a hunch many clinicians share: that people with autism experience great stress.

New data linking autism to steroid levels in pregnant women are inconsistent with basic facts about the biochemistry of steroids.

Tuberous sclerosis provides a unique opportunity to understand autism because about half of people with that single-gene condition also have autism.

Certain patterns of electrical activity in the brain may signal autism in children with tuberous sclerosis complex, a related genetic condition.

Heart-rate patterns and changes in pupil size may herald Rett syndrome, autism or related conditions.

People with autism may show an altered pattern of brain activity when looking at two competing images.