Autism is a neurological spectrum disorder that affects 1 out of every 88 children in the United States (according to The Centers for Disease Control & Prevention). Present research has yet to discover what causes autism.
The primary onset of autism is evidenced by a child not reaching developmental milestones that are typical for their age. Secondary onset can be defined as when a child reaches milestones at the typical rate and then starts to regress, losing previously learned skills. A child affected by autism often experiences delays in social interactions, play skills, receptive language, and the ability to communicate appropriately.
If you have any concern about your child's development, you should discuss it with your child's primary care physician