A research team with the UC Davis MIND Institute believes an excess of cerebrospinal fluid and enlarged brain size in infancy could be two biomarkers for autism. They identified both through a study of 55 infants from 6 months old to three years of age, 33 of which had an older autistic sibling. They found that by ages 6 to 9 months, children who developed autism had more than the usual amount of cerebrospinal fluid around the brain. Additionally, autistic children showed signs of enlarged brains before 2 years of age, based on MRI scans. The study is detailed in the journal Brain, which is published by Oxford University Press. Release