Women with autism show fewer repetitive behaviors than men with the condition on a standard diagnostic test, leading to possible underdiagnoses.

Studying large numbers of fraternal and identical twins may help tease apart genetic and environmental contributors to autism.

Journalists John Donvan and Caren Zucker detail autism’s transformation from a diagnosis shrouded in shame to an increasingly accepted, even celebrated, condition.

The rate of autism among 4-year-olds is lower than that among 8-year-olds, suggesting that many children go undiagnosed until they start school.

Hillary Clinton makes history with her autism plan, an Israeli army unit seeks soldiers on the spectrum, and there are more mustachioed medical department heads than female ones.

Children with autism are more likely to be overweight or obese than their peers, but it’s unclear why, or what doctors should do about it.

The latest estimate of autism prevalence suggests the condition is more common than previously thought, and highlights the complexity in the seemingly simple statistic.

About 1 in 45 children in the U.S. have autism, up 79 percent from the estimate for 2013. But there is more to the apparent jump in diagnoses than meets the eye.

Roughly 13 percent of children with autism eventually lose their diagnosis, either because they outgrow it or because they never had autism to begin with.

Differences between the brains of men and women with autism may help explain why men are more susceptible to the condition and women appear to be protected from it.