Health & Science What is 90% of autism caused by? March 8, 2026 by Mercier | Leave a Comment It is a common misconception that autism is caused by a single factor or a specific percentage of causes. Autism Spectrum Disorder (ASD) is a complex neurodevelopmental condition with no single identifiable cause that accounts for 90% of cases. Instead, research points to a combination of genetic and environmental influences that interact in intricate ways. […] Read more ยป