Parents who have one child with an autism diagnosis can more accurately spot signs of the condition in their younger child at 12 months of age than clinicians can.

Sally Ozonoff is looking for early signs of attention deficit hyperactivity disorder in videos of hundreds of younger siblings of children with autism.

Children with autism do not show the burst of vocabulary growth that usually accompanies learning to walk.

Some infants who have an older sibling with autism show weak brain signals at 3 months of age.

A cannabis gel may ease features of fragile X syndrome, omega fatty acids show promise for autism in two trials, and oxytocin reinforces social behaviors through the brain’s reward pathway.

A gene called TRIO may be a hotbed for autism mutations, an international collaboration focuses on the whole brain and one behavior, and Autism Speaks cuts grant spending.

Studies of infants at risk for autism have not yielded a test to predict who will eventually be diagnosed. But they have transformed our understanding of the condition.

The loss of abilities that besets some toddlers with autism is probably less sudden and more common than anyone thought.

A movement to ban valproate during pregnancy gains a foothold in France, people with auditory hallucinations seek to demedicalize the experience, and adults on the spectrum speak out.

Babies with a family history of autism have heart rates that are unusually low and that respond aberrantly to speech sounds.