Although autism spectrum disorder is typically diagnosed in children, research shows that more subtle presentations of ASD are often not identified until adulthood. Adult diagnosis is particularly common in autistic women, who are less likely to display stereotypical autistic traits and are more likely to internalize their presentation. Diagnosing autism in adults requires some modification of the typical approach used to diagnose children, including the use of different screening tools. As with child diagnosis, parental input is frequently sought for the diagnosis, but significantly more weight is placed on the individual’s self-report in adult diagnosis.