Autism in Girls: Why They're Undiagnosed & What We Can Do (2026)

A groundbreaking study has revealed a shocking disparity in autism diagnoses, with girls being significantly less likely to receive a timely diagnosis compared to boys. This revelation challenges long-held assumptions and sheds light on a critical issue that has been overlooked for far too long.

The research, led by the Karolinska Institutet in Sweden, analyzed the autism diagnosis rates of over 2.7 million individuals born in Sweden between 1985 and 2020. The findings were eye-opening: by the age of 20, the diagnosis rates for men and women were almost equal, dispelling the myth that autism is predominantly a male condition.

But here's where it gets controversial... Despite this equality in diagnosis rates by early adulthood, the study uncovered a significant gender gap in childhood diagnoses. Boys were diagnosed on average nearly three years earlier than girls, with a median age of 13.1 for boys compared to 15.9 for girls. This means that girls are often left waiting, undiagnosed and unsupported, while their male counterparts receive the necessary interventions and support.

And this is the part most people miss... The study's lead author, Dr. Caroline Fyfe, emphasizes that this gender difference in autism prevalence is much lower than previously believed. She attributes this to the underdiagnosis and late diagnosis of women and girls, highlighting a systemic issue within the diagnostic process.

The research also found that while gender disparities in diagnosis rates remained relatively consistent for children under 10, they decreased rapidly for older age groups. This suggests that as individuals age, the gender gap in autism diagnoses narrows, further emphasizing the need for improved diagnostic practices and awareness.

Patient advocate Anne Cary, in a linked editorial, argues that these discrepancies are not due to a true gap in incidence but rather systemic biases in diagnosis. She highlights the potential for delayed symptom onset and the impact of masking, where individuals hide their autistic traits, as well as the need to refine diagnostic methods and tools.

Autism charities and experts are calling for urgent action to address gender stereotypes and improve access to diagnosis and support for women and girls. Dr. Judith Brown, from the National Autistic Society, emphasizes the importance of breaking down barriers and challenging outdated assumptions. She highlights the tendency for women and girls to "mask" traditionally recognized signs of autism, making it harder to identify the challenges they face.

Jolanta Lasota, CEO of Ambitious about Autism, echoes these sentiments, stating that autistic girls have unique experiences that have gone unnoticed for far too long. By misunderstanding their needs or attributing their challenges to other factors, these girls have missed out on crucial support, often leading to mental health crises.

Dr. Conor Davidson, a former autism champion, highlights the increased number of women seeking autism assessments in recent years, indicating a growing awareness and need for support. He emphasizes the importance of timely assessments and care for autistic women, as well as the need for psychiatrists to consider autism when assessing patients with mental health problems, especially women.

This study serves as a wake-up call, urging us to reevaluate our understanding of autism and ensure that all individuals, regardless of gender, receive the support they deserve. It's time to challenge stereotypes, refine diagnostic practices, and provide equal opportunities for diagnosis and care.

So, what are your thoughts? Do you think this study highlights a critical issue that needs immediate attention? Let's spark a conversation and ensure that no one is left behind in the journey towards understanding and supporting autism.

Autism in Girls: Why They're Undiagnosed & What We Can Do (2026)
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