Children with autism are more likely to have both sleep problems and constipation than would be expected based on the prevalence of each of those conditions.

More than half of people on the spectrum have four to five other conditions. Which conditions, and how and when they appear, varies from one autistic person to the next.

A greater proportion of 3-year-old girls than boys with autism have psychiatric features such as anxiety and moodiness.

Many people with autism have difficulty falling and staying asleep, but there may be ways to help them.

Sleep problems in autism may stem from the same biological changes that underlie the core features of the condition.