A new survey suggests autism prevalence has more than doubled over nine years, but the numbers may reflect only a rise in awareness and better data collection.

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

Estimates for autism’s prevalence in three U.S. states reveal significant inequalities in how children of different races and ethnicities are counted and assessed.

Social media is connecting families with researchers who study rare conditions related to autism — to the benefit of both.

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

The prevalence of autism among school-aged children in Qatar is higher than the worldwide average.

The fight between those who define autism as a medical condition and those who see it as a mere difference has reached vitriolic levels. Can the two sides come together to support all autistic people?

The prevalence of autism in 4-year-old children in the United States increased to match a previously reported rise in 8-year-old children, but children are still being evaluated later than is ideal.

About 1 in 100 children in China has autism, suggesting the condition is more common in the country than previously thought.

Una remota ciudad colombiana es el hogar del grupo más grande de personas con síndrome de X frágil. Los científicos están aprendiendo de ellos y tratando de ayudar.