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World Autism Awareness Day 2026 highlights the theme “Autism and Humanity – Every Life Has Value,” stressing the importance of understanding and inclusion for people with autism. A significant gender gap exists, with boys more affected than girls. Here are five key reasons behind this gap.
World Autism Awareness Day 2026: Why are boys diagnosed with autism more frequently than girls?(Pexels/RDNE Stock project )Every year on 2 April, World Autism Awareness Day 2026 is observed to foster understanding, acceptance, and inclusion for people with autism worldwide.
The theme for 2026 – “Autism and Humanity – Every Life Has Value" – emphasizes the innate humanity and the right to contribute to society of all those on the autism spectrum, urging society at large to recognize and respect the rights and dignity of all those on the autism spectrum.
Autism Spectrum Disorder (ASD) has consistently shown a gender gap, in which boys are three to four times more likely to suffer from this condition than girls. At first glance, the gender gap in ASD can be explained by genetics. However, there is more to it than meets the eye.
Genetic Factors and Female Protective Effect
There is a theory of a ‘female protective effect,’ in which girls need a higher load of genetic changes to suffer from ASD.
“Boys have only one sex chromosome, which means they are more likely to suffer from autism spectrum disorder because of genetic changes in the single chromosome. On the other hand, girls have two sex chromosomes,” explains Dr Furqan Khan, Consultant Neurologist at Saifee Hospital.
Hormonal Influences and Brain Development
Hormones may play a role as well. Studies on prenatal brain development have shown that exposure to more testosterone may influence how social communication circuitry develops in the brain.
“The ‘Extreme Male Brain' theory by Simon Baron-Cohen (British clinical psychologist and professor of developmental psychopathology at the University of Cambridge) links these hormone effects to behaviour commonly observed in autism, including a preference for systems and patterns rather than social interactions,” says Dr Khan.
Although there is some debate about these theories, the doctor says that they add another important dimension to the discussion.
Diagnostic Bias and Lack of Recognition in Girls
More and more evidence is pointing to a lack of recognition of girls with autism. The diagnostic criteria were mostly developed based on boys’ symptoms of autism, which tend to include more obvious social difficulties, repetitive behaviour or language delays.
Dr Khan says that “Girls’ symptoms are more subtle in most cases. They may have better social skills in imitating social behaviour, maintaining eye contact, and fitting in with their peers, a phenomenon called ‘camouflaging’.”
The Hidden Challenges of Camouflaging
This masking can have a hidden cost. Girls can sometimes receive a later diagnosis in adolescence or adulthood, sometimes following years of being misunderstood or misdiagnosed for anxiety or depression. Their interests can also seem more socially acceptable, such as a deep interest in reading, animals, or fictional characters, which can make it less obvious to others that they have autism.
Differences in Early Signs
It is therefore expected that early signs may vary. For boys, there may be obvious signs of red flags, such as a lack of social engagement and motor behaviour. Girls may appear socially active, yet they may face serious problems in connecting and interacting with people, says the expert.
It is therefore crucial to note these differences in early signs in order to intervene early in a child’s condition. Early intervention ensures children have access to support systems that can significantly enhance their communication skills and quality of life.
To conclude, there is a high prevalence of autism in boys compared to girls due to a complex interaction of biological and diagnostic factors. As more people become aware of autism, there is a growing recognition of the condition in girls, thus narrowing what may have been a wide difference in prevalence.
It is not just a necessity in terms of scientific research; it is a necessity in terms of public health policy as well. Every individual can increase their understanding of autism and make sure that every child, regardless of gender, is recognized and supported in their journey of growth and development.
(The author, Nivedita, is a freelance writer. She writes on health and travel.)
English (US) ·