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.

Autistic children from low-income families are undercounted and underserved, a gap community leaders are working to bridge.

About 1 in 40 children in the United States has autism, according to a survey conducted in 2016. Roughly 30 percent of those children were not being treated for the condition at the time.

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.

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.