01/15/2026
Autism spectrum disorder (ASD) is a neurodevelopmental condition typically diagnosed in childhood. But some people, specifically people assigned female at birth , may go undiagnosed until adulthood.
Traditional estimates find that boys are four times as likely as girls to receive an autism diagnosis. But experts are realizing that almost as many females as males may have autism — recent research shows that nearly 80% of autistic females are undiagnosed as of age 18.
An autism diagnosis can be a relief for many adults. It may explain symptoms they’ve always had but have never been able to explain.