Here’s a startling fact: autistic girls are significantly less likely to receive a diagnosis compared to boys, even though autism may be just as prevalent in females as in males. But here’s where it gets controversial—a groundbreaking study reveals that boys are up to four times more likely to be diagnosed in childhood, raising questions about systemic biases in the diagnostic process. Could our understanding of autism be fundamentally flawed?
Led by the Karolinska Institutet in Sweden, this large-scale research analyzed autism diagnosis rates among 2.7 million individuals born between 1985 and 2020. The findings? By age 20, diagnosis rates between men and women were nearly identical, shattering the long-held belief that autism is predominantly a male condition. And this is the part most people miss—girls were diagnosed, on average, nearly three years later than boys, with median ages of 15.9 for girls versus 13.1 for boys. While boys under 10 were three to four times more likely to be diagnosed, girls ‘caught up’ by age 20, thanks to a surge in diagnoses during adolescence.
Dr. Caroline Fyfe, the lead researcher, emphasized, ‘Our findings suggest the gender gap in autism prevalence is far smaller than previously thought, largely due to girls and women being underdiagnosed or diagnosed late.’ This delay isn’t just a statistic—it’s a barrier to critical support, leaving many girls and women struggling without the understanding and resources they need.
Published in the BMJ, the study also highlights that while gender disparities persist for children under 10, they diminish significantly in older age groups. The authors note, ‘The male-to-female ratio for autism may be far lower than we’ve assumed, to the point where it becomes indistinguishable by adulthood in Sweden.’ Bold claim, right? But it’s backed by data—and it challenges us to rethink how we approach autism diagnosis.
Patient advocate Anne Cary argues that the discrepancy isn’t about incidence but systemic biases. ‘Girls who would eventually be diagnosed with autism had less than a third chance of receiving a diagnosis before age 10,’ she explains. This isn’t just about delayed symptoms or ‘masking’—it’s about diagnostic tools that may be inherently biased against females. As a result, many autistic girls and women are misdiagnosed with psychiatric conditions like mood or personality disorders, forcing them to advocate fiercely for proper recognition.
Autism charities are sounding the alarm, urging action to dismantle gender stereotypes. Dr. Judith Brown of the National Autistic Society points out, ‘Gender should never block access to diagnosis or support. Historically, autism was wrongly seen as a male condition, but we now know girls and women often ‘mask’ typical signs, making their challenges harder to identify.’ This masking doesn’t just go unnoticed—it takes a toll. Misdiagnosed women often develop coexisting mental health issues like anxiety and depression, exacerbated by a lack of support and the exhaustion of pretending to fit in.
Jolanta Lasota, CEO of Ambitious about Autism, adds, ‘Autistic girls have been overlooked for far too long. Their needs are misunderstood, dismissed, or misattributed, leaving them without vital support—sometimes until they reach a mental health crisis.’ The solution? Researchers and diagnostic services must deepen their understanding of how autism presents in girls and women, and support systems must adapt to meet their needs.
Dr. Conor Davidson, a former autism champion for the Royal College of Psychiatrists, warns, ‘Autism in girls often goes undetected in childhood, with signs emerging only in adolescence or adulthood.’ He notes a recent shift: adult neurodevelopmental clinics in the UK are seeing more women than men seeking diagnoses. Yet, waiting lists for assessments remain unacceptably long, leaving countless women in limbo. ‘Psychiatrists must consider autism when assessing mental health issues, especially in women whose autism may have been missed in childhood,’ he urges.
Here’s the big question: Are we failing autistic girls and women by clinging to outdated stereotypes? And if so, what can we do to ensure they receive timely, accurate diagnoses and the support they deserve? Share your thoughts in the comments—let’s spark a conversation that could change lives.
