The symptoms of autism spectrum disorder present in drastically different ways in girls than in boys. In terms of comorbid and co-occurring conditions, both boys and girls with autism experience anxiety at a high rate. However, girls have a higher probability of experiencing the following comorbid or co-occurring conditions: eating disorders and self-harm. In the area of repetitive or restrictive interests, girls exhibit less restrictive interests and repetitive behaviors than boys. Boys exhibit aggressive behaviors far more than girls. Autistic girls experience more internalization of their symptoms and emotions than autistic boys.
The most notable differences occur in language and social development. Autistic girls have increased language development and communication abilities compared to autistic boys. Autistic girls are very often more verbal and communicative than their male autistic counterparts. In the area of social skills, boys experience more social deficits and gravitate toward solitude whereas girls gravitate toward social behaviors. Boys are also more likely to be socially rejected by their peers than girls.
Autistic girls adapt their behavior to fit societal expectations of their gender, therefore presenting their autistic traits differently than boys. Girls in Western society, such as in the United States, are expected to be the more social and communicative gender. They are expected to conform to social norms, have a high level of empathy, be caregivers to those around them, and act in a socially appropriate manner. Because of the enormous pressure for girls to be social and communicative, girls with autism frequently learn how to camouflage, or mask, their autistic traits in order to fit in with their peers and meet the societal expectations of their gender. Thanks to this, girls are less likely to present with overt autistic symptoms.