Final answer:
Autism spectrum disorders (ASD) are a group of developmental brain disorders characterized by deficits in social interaction, communication, and repetitive behaviors or interests. ASD is usually evident by age 3, although the severity and manifestation of symptoms can vary from person to person. Estimates suggest that about 1 in 54 children have ASD, with a higher prevalence in males.
Step-by-step explanation:
Autism spectrum disorders (ASD) are a group of developmental brain disorders characterized by deficits in social interaction, communication, and repetitive behaviors or interests. ASD is usually evident by age 3, although the severity and manifestation of symptoms can vary from person to person.
Estimates suggest that about 1 in 54 children have ASD, with a higher prevalence in males. Early diagnosis and intervention can greatly improve outcomes for individuals with ASD.