Autism spectrum disorder (ASD) is a developmental disability caused by differences in the brain. People with ASD often have problems with social communication and interaction, and restricted or repetitive behaviors or interests. People with ASD may also have different ways of learning, moving, or paying attention.
What Causes Autism? Studies indicate the rate of autism is rising, but causes are not well-understood. Scientists have found rare gene changes, or mutations, as well as small common genetic variations in people with autism, implying a genetic component.