On this week’s ASF podcast, regression—what is it and who can see it? Using the right tools, both parents and clinicians can see that many more children with autism than thought show regression, a gradual decline or loss of skills starting at around 12 months of age and showing continual declines until 36 months of age. In 2016, a National Institutes of Health (NIH) committee concluded that regression is due to biological events that disrupt the formation of specific brain circuits at critical times in development.