Autism Spectrum Disorders (ASDs) are a group of developmental disorders that pose social, behavioral and communication challenges that range from mild to severe. The CDC estimates that one in every 110 U.S. children have an ASD and approximately 730,000 people aged 0 to 21 years currently live with the disorder. On average, boys are four- to five- times more likely than girls to develop the disorder.
ASDs begin before the age of 3 years. Some children develop symptoms in the first few months of life, whereas others appear to develop normally until the age of about 18 to 24 months. Learn more about how to recognize ASDs in the slideshow below.