Autism Spectrum Disorder (ASD)

Autism spectrum disorder (ASD) is a complex neurological and developmental disorder that begins early in life and affects how a person acts, learns, and interacts with others.

Symptoms of autism range from poor eye contact, repetitive behaviors, and "tuning people out" to intense tantrums and high sensitivity to noise.

The behavioral symptoms of autism often appear early in development. Many children show symptoms of autism by 12 months to 18 months of age or earlier.

Scientists don't know exactly what causes autism. Because the disorder is so complex and no two people with autism are exactly alike, there are probably many causes for autism.

Health care providers look for certain symptoms or groups of symptoms to diagnose autism spectrum disorder (ASD). If you have concerns about your child's development, talk to his or her health care provider right away.

Because the symptoms of autism are so different, there is currently no one standard treatment for the disorder. But there are many treatments that help minimize the symptoms and maximize abilities.

NICHD research on autism includes a range of topics:

• NICHD Research Goals
  
• Activities and Advances

NICHD conducts and supports a variety of clinical research projects related to autism spectrum disorder (ASD).

Find answers to other common questions about autism, such as what other conditions are associated with it and what impact new diagnostic criteria may have on people with ASD.

Links to websites of groups that study or provide information about autism and related disorders.