Without timely intervention, intellectual disability in autistic children can worsen as they grow older.

Autism may be just as common among children missing a segment of chromosome 16 as it is in those with an extra copy.

Two independent sets of mice missing a copy of SETD5, a top autism gene, link the gene to the condition’s traits.

Many countries in Europe are reckoning with the growing demand for genetic tests for autistic people — and the accompanying ethical and scientific considerations.

Some children who dramatically lose a range of abilities after age 2 may have a condition called childhood disintegrative disorder.

A new advocacy group for people with severe autism taps into the deep divide in the community over who should speak for those on the spectrum.

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.

This year’s list of top papers highlights new dimensions in our understanding of autism genetics and hints at novel treatments.

A lack of interest, training and pay may limit the supply of specialists best equipped to diagnose and treat children with autism.

Mice lacking one copy of a gene linked to autism are small and show striking changes in the number and quality of their cries.