Why Autism Is Often Harder to Detect in Girls — and How It Can Be Misunderstood Until Adulthood

For many years, autism was viewed primarily through the lens of how it presents in boys. As a result, countless girls with autism have gone undiagnosed, misunderstood, or mislabelled. While awareness is improving, many autistic girls continue to slip through the cracks during childhood, only receiving a diagnosis much later in life—sometimes after years of struggling with anxiety, depression, eating disorders, or other mental health challenges.

Understanding why autism can be harder to detect in girls is an important step toward ensuring that children receive the support they need early in life.

Autism Doesn't Always Look the Same

Traditional descriptions of autism often focus on behaviours that are more commonly observed in boys, such as obvious social difficulties, repetitive behaviours, or highly unusual special interests. However, autistic girls may present differently.

Many girls develop strategies to compensate for their social challenges. They may closely observe their peers, imitate social behaviours, and rehearse conversations in order to fit in. This process, often referred to as "masking" or "camouflaging," can make their difficulties less visible to parents, teachers, and healthcare professionals.

As a result, a girl may appear socially competent on the surface while experiencing significant confusion, exhaustion, and anxiety internally.

The Hidden Struggle of Social Camouflaging

From a young age, girls are often socialised to be cooperative, attentive, and relationship-oriented. Many autistic girls become highly motivated to blend in with their peers.

They may:

• Copy the speech, interests, or behaviours of friends

• Force themselves to make eye contact despite discomfort

• Memorise social rules rather than intuitively understanding them

• Suppress behaviours that might draw attention to their differences

While these strategies can help girls navigate social situations, they often come at a considerable emotional cost. Constantly monitoring and adjusting their behaviour can be mentally exhausting and may contribute to chronic stress and low self-esteem.

Why Girls Are Often Misdiagnosed

Because autistic girls may not fit traditional stereotypes, their difficulties are sometimes attributed to other conditions.

A girl who is socially withdrawn may be viewed as shy. One who experiences emotional overwhelm may be described as sensitive or anxious. Difficulties with attention and organisation may be attributed solely to ADHD.

While many autistic individuals do also experience anxiety, depression, ADHD, or other conditions, these diagnoses can sometimes overshadow the underlying autism.

Research suggests that autistic girls are more likely than boys to receive alternative diagnoses before autism is recognised.

When Autism Goes Unrecognised Into Adulthood

For some individuals, autism remains undetected throughout childhood and adolescence. By adulthood, years of struggling to meet social expectations can contribute to significant mental health difficulties.

Adults who later discover they are autistic often report a long history of feeling different without understanding why. Prior to receiving an autism diagnosis, they may have been treated for:

Anxiety Disorders

Constantly navigating confusing social situations and attempting to mask autistic traits can lead to persistent anxiety. Social anxiety is particularly common among autistic women who have spent years worrying about saying the wrong thing or being judged by others.

Depression

Repeated experiences of social rejection, misunderstanding, or feeling disconnected from peers can contribute to depression. Many adults describe a sense of isolation and chronic self-criticism before learning that autism played a role in their experiences.

Eating Disorders

Researchers have identified higher rates of eating disorders among autistic females. Sensory sensitivities, rigid thinking patterns, anxiety, and a need for predictability may all contribute to difficulties around food and eating.

Obsessive-Compulsive Disorder (OCD)

Autism and OCD can share some overlapping features, such as repetitive behaviours and a preference for routine. This can sometimes make it challenging to distinguish between the two conditions, particularly when autism has not previously been considered.

Borderline Personality Disorder (BPD)

Some autistic women have historically received a diagnosis of Borderline Personality Disorder before autism was recognised. Difficulties with emotional regulation, interpersonal relationships, and identity development may appear similar on the surface, despite having different underlying causes.

The Importance of Early Recognition

Early identification does not mean placing limits on a child's potential. Rather, it provides an opportunity to better understand how a child experiences the world and to provide support that aligns with their needs.

When autism is recognised early, children can benefit from:

• Appropriate educational support

• Social and emotional skill development

• Greater self-understanding

• Improved mental health outcomes

• Reduced pressure to constantly mask their differences

Most importantly, children learn that their challenges are not personal failures. They are differences in neurodevelopment that can be understood and supported.

What Parents Should Look For

Autism in girls may be less obvious, but there are signs that warrant further assessment:

• Intense exhaustion after social interactions

• Difficulties maintaining friendships despite wanting friends

• Strong interests that may appear age-appropriate but are unusually intense

• Sensory sensitivities to noise, clothing, food, or touch

• High levels of anxiety, especially in social situations

• Rigid routines or distress when plans change

• Emotional overwhelm or frequent shutdowns after school

If concerns persist, consulting a psychologist or developmental specialist with experience assessing autism in girls can be valuable.

Looking Beyond Stereotypes

As our understanding of autism evolves, it is becoming increasingly clear that autism can present differently across individuals. Recognising these differences is particularly important for girls, whose experiences have historically been overlooked.

By looking beyond outdated stereotypes, parents, educators, and clinicians can help ensure that autistic girls are identified earlier, supported more effectively, and understood for who they truly are.

A timely diagnosis is not simply about assigning a label—it is about providing clarity, validation, and access to support that can make a meaningful difference across the lifespan.