ScienceDaily reports that "After evaluating twin pairs in which at least one child has autism or autism spectrum disorder (ASD), researchers suggest that the shared environment may play a more substantial role in development of the condition than shared genes do, according to a report published Online First by Archives of General Psychiatry,"
Read full ScienceDaily article Genetic Component of Autism Spectrum Disorders May Be Moderate Compared to Environment, Twin Study Suggests.
Read the original study Genetic Heritability and Shared Environmental Factors Among Twin Pairs With Autism.