Autism is a developmental disorder characterized by difficulties with social interaction and communication, and restricted or repetitive behaviors. The core behaviors include impaired social interaction, problems with verbal and nonverbal communication, and repetitive behaviors or severely limited interests. It is estimated that 1 in 150 children have autism, which is 4 times more common in males than females. While the exact causes are unknown, autism is generally believed to involve both genetic and environmental factors. There is no cure for autism, but therapies and behavioral interventions can help children develop skills and improve symptoms.