A variant in a gene that regulates immune responses is more common in children with autism than in those without this disorder.
Researchers in Sweden are assembling a large group of identical twin pairs, with only one twin in each pair having autism.
A questionnaire that clinicians can administer in 20 minutes, either in person, by phone or online, correctly distinguishes children with autism from those without the disorder 86 percent of the time.
Children whose older sisters are on the spectrum are at higher risk for autism than are those with affected older brothers, a new study suggests. Younger brothers of children with autism are at greater risk than younger sisters.
The genetic makeup of an individual plays much a bigger role than environmental factors in whether he or she develops autism, according to one of the largest twin studies to date.
A 20-minute test enlists parents in gauging a toddler’s social development by showing them a video of how a typically developing child acts.
Restricted behaviors in autism represent a genetic link with inattention and hyperactivity in attention deficit hyperactivity disorder, say Tinca Polderman and Henrik Larsson.
The genetic and environmental factors that underlie difficulties with language differ from those that influence other autism traits, according to a new study of more than 3,000 twin pairs. The study, published 2 August in the American Journal of Medical Genetics Part B: Neuropsychiatric Genetics, suggests that difficulty with language is not a core symptom of autism.
Common genetic variants that have minor effects may contribute about half the risk of developing autism, according to a study published Sunday in Nature Genetics. Identifying these variants would require tens of thousands of samples.