Autism spectrum disorder (ASD) is a developmental disability. It affects language development, social interaction and behavior. Symptoms of ASD range from mild to severe.

ASD occurs in as many as one in 59 children. Males are four times more likely to have autism than females. An estimated one out of 37 boys and one out of 151 girls are diagnosed with autism each year. Symptoms of ASD can appear as early as 18 months of age.