An estimated 1 in 68 (14.6 per 1,000) school-aged children have been identified with autism spectrum disorder (ASD), according to a CDC report published today in the Morbidity and Mortality Weekly Report (MMWR) Surveillance Summary. This report shows essentially no change in ASD prevalence, the proportion of school aged-children with ASD, from the previous report released in 2014. However, it is too soon to know whether ASD prevalence in the United States might be starting to stabilize. CDC will continue tracking ASD prevalence to better understand changes over time.