A new study that combines data from more than 20 million births has found that a cesarean section delivery is associated with autism and attention deficit hyperactivity disorder.

People on the spectrum, and girls and women in particular, are at high risk of suicide; siblings of autistic people are also at heightened risk.

A law implemented four years ago has made it difficult for Dutch children in some regions to have access to mental health care.

Adults with autism tend to have a different set of psychiatric conditions than do those with attention deficit hyperactivity disorder.

Nearly all children who lose their autism diagnosis have other conditions, such as anxiety and language and behavioral disorders.

Children in families with a history of brain conditions may be at increased odds of being autistic.

For autistic people, social difficulties may contribute to troubles with daily living — from brushing teeth to taking a bus.

The brains of autistic children show few differences from those of children with attention deficit hyperactivity disorder, or even of controls.

A study of more than 5 million people reveals the onset and prevalence of nine diagnoses that often accompany autism.