Regression is a complication that some autistic people experience when they are unable to meet life's demands. It is sometimes referred to as autistic burnout. "In the first few years of life, some autistic toddlers reach developmental milestones, such as talking, crawling, and walking, much earlier than the average child; whereas others are considerably delayed.... Somewhere between 1 1/2 to 3 years of age; then autistic symptoms begin to emerge. These individuals are often referred to as havin