Parents of autistic children are paying tens of thousands of dollars for stem cell therapies that often use medical waste. Despite the risks, regulators have been slow to act.

Autism doesn’t just affect boys and men, but research on the condition still predominantly focuses on them. Some scientists are finally beginning to include women and nonbinary people in their studies.

Autism and obsessive-compulsive disorder frequently accompany each other; Scientists are studying both to understand how they differ.

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

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.

Genetic tests for people with autism are far from routine and don’t always yield results, but the information they offer can change lives.

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

Autistic people who have trouble speaking or moving often do poorly on standard tests of intelligence. Newer methods promise to uncover their abilities — and improve our understanding of autism itself.

Autism is predominantly genetic in origin, but a growing list of prenatal exposures for mother and baby may sway the odds.

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