We should never assume that females and males on the autism spectrum should look the same. There are gender differences including behavior and interests.
Using such tools as the Sally-Anne Test along with assessing over longer periods of time is essential in properly diagnosing girls who fall within the autism spectrum. Males currently represent the majority of children with autism. However, it is appears that girls are not fully accounted for in those figures. Females not properly diagnosed and treated at an early age often have severe problems later in life. These issues include depression, bullying and unhealthy social relationships due to their inability to understand social cues
A Newsweek article made a similar point a couple of years ago.
