Autism in girls: why it looks so different

My daughter Annabel was diagnosed autistic in early 2024, a few days before her sixth birthday. By that point I'd been watching her struggle for four years; watching her fall apart at home over clothes, food, the texture of a toothbrush, the idea of going anywhere different. My sister, an educational psychologist, had informally flagged what she was seeing long before Annabel started school. And yet when school began, nobody there saw it. The professionals we spoke to couldn't see it either.

What they were seeing was a little girl who held herself together in the classroom, bottled everything up, and then came home and unravelled. With two or three visibly struggling boys in her year group, she wasn't a priority. This experience, it turns out, is so common for autistic girls that researchers have a name for the mechanism behind it.

If you're reading this as the parent of a daughter you're worried about, or as a woman who's only recently started wondering whether your own childhood makes more sense through an autism lens, this article is for you.

Why autism in girls is so often missed

Autism is diagnosed around three to four times more often in boys than girls. For a long time that figure was taken at face value: boys are just more likely to be autistic. The picture is more complicated than that.

Current research points to several overlapping reasons why autistic girls are underidentified: autism assessments are less sensitive to the traits more commonly found in women and girls, autistic traits in girls tend to be under-reported by teachers, and girls are significantly more likely to mask or camouflage their differences.

The diagnostic criteria for autism were largely developed from studies of autistic boys and men. The behaviours that make autism visible in clinical settings — obvious repetitive movements, clear social withdrawal, difficulties with eye contact — tend to be more prominent in that presentation. Girls frequently present differently, and the tools weren't built to find them.

Key numbers:

• Only 1 in 5 autistic girls is diagnosed before the age of 11, compared to more than half of autistic boys
• The male-to-female diagnosis ratio is estimated at between 3:1 and 4.5:1, though researchers increasingly believe this reflects missed diagnoses rather than true prevalence
• Autistic females are significantly more likely to have co-occurring anxiety, depression, and eating disorders than autistic males

What masking looks like in girls

Masking — also called camouflaging — is the process by which autistic people learn to hide or compensate for their autistic traits in social situations. It's not a conscious decision, especially in children; it tends to develop over time as a response to social pressure and the repeated experience of standing out.

Camouflaging can involve masking autistic behaviours and employing compensatory strategies to overcome social difficulties. Common strategies include suppressing repetitive movements, forcing eye contact, using scripted conversations, and using learned rules to respond to others' non-verbal behaviour.

Autistic females report significantly higher camouflaging scores than males, with particular differences in compensation and masking. In practice, this means autistic girls are often described by teachers as quiet, well-behaved, or a little anxious. They watch their peers carefully and imitate what they see. They save the falling apart for home.

This is exactly what made Annabel so hard to identify at school. She was holding it together in the classroom. The cost of that — the emotional dysregulation, the sensory distress, the complete inability to tolerate transitions, clothes, food — was almost entirely invisible to everyone except us.

Research with adolescent autistic girls confirms that camouflaging varied significantly by context, with girls reporting far less need to camouflage at home: "at home I can be myself." The same girls reported camouflaging in all school settings.

The problem is that masking is exhausting, and the persistent effort to monitor and adjust one's behaviour in social settings can lead to exhaustion, anxiety, depression, and difficulties forming an authentic sense of self. For girls who aren't diagnosed, that cost is paid for years or decades without any explanation or support.

What female autistic signs actually look like

Because the textbook presentation of autism was developed largely from studies of boys, the signs that tend to flag a girl as autistic can look quite different. This isn't a clean list — every autistic person is different — but these are the patterns researchers and clinicians are increasingly identifying as part of what's sometimes called the female autism phenotype.

Social differences that can be easy to miss:

• Intense interest in social connection, but difficulty sustaining it; friendships that feel one-sided or exhausting
• Preference for one close friendship over groups; distress when that friendship changes
• Watching and imitating peers very carefully, which can look like typical social behaviour on the surface
• Strong interest in imaginative or fantasy play that can mask difficulties with reciprocal interaction
• Following social rules rigidly, or becoming visibly anxious when the social script isn't clear

Emotional and sensory presentation:

• Emotional dysregulation that seems disproportionate, often more visible at home than at school
• Significant distress around sensory experiences: clothing textures, food, hairwashing, tooth brushing, unexpected touch or noise
• Anxiety that's hard to attribute to anything specific, or that attaches itself to many different things
• Meltdowns or shutdowns at home after holding things together elsewhere (sometimes called the "exploding lunchbox" effect)
• Difficulty with transitions, even small ones; rigidity around routine that may not look like "typical" autism rigidity

School and learning:

• Performs well or appears to cope at school despite significant difficulties at home
• Described by teachers as shy, anxious, or a people-pleaser, rather than as having additional needs
• May have strong academic ability that masks other difficulties
• Social difficulties that become more visible as peer relationships become more complex, typically around secondary school age

Research also shows that autistic females are significantly more likely to have co-occurring internalising disorders — anxiety, depression, eating disorders — than autistic males, and these tend to increase in severity over time. Autistic males are more likely to present with externalising difficulties like behavioural problems, which are more likely to trigger a referral.

This is important, because it means autistic girls are often referred for anxiety or emotional difficulties without the underlying autism ever being identified. The anxiety is real; it's just not the whole picture.

How autism assessment works for girls

The standard NHS autism assessment pathway runs from GP referral to a local autism assessment service, which may sit within paediatrics, CAMHS, or a community team. Waiting times are long: various studies suggest the male-to-female diagnosis ratio ranges from 2:1 to 16:1, and the tools most commonly used in NHS assessments were largely standardised on male populations.

If you're being told that professionals can't see what you're seeing, that is a recognised and well-documented problem; it's not that you're wrong.

Getting a more specialist assessment:

Some families pursue private assessment, particularly when NHS waits are long or when previous assessments have been inconclusive. For girls specifically, it's worth looking for a clinician or service with explicit experience in assessing the female autistic phenotype. The Lorna Wing Centre for Autism, run by the National Autistic Society, specialises in complex and subtle presentations, including women and girls. The DISCO assessment tool, developed at the centre by Dr Lorna Wing and Dr Judith Gould, is a flexible, person-centred diagnostic tool recommended by the NHS.

We went to the Lorna Wing Centre for Annabel's assessment. It's based in Kent and the assessment itself takes a full day; the pre-assessment process, which involves detailed paperwork, questionnaires, and calls over several months, is extensive. It isn't cheap, and I'm aware not every family can access it. But if you're local to south-east London or Kent and you have the option, their expertise in girls specifically is the reason we chose them.

Whether you're pursuing an NHS or private route, bringing as much written evidence as possible helps: school reports going back as far as you have them, your own notes on what you observe at home, and anything from other professionals who've been involved. The picture clinicians need to see is the one that's often invisible in a clinical appointment.

What about autistic women who weren't diagnosed as children?

A significant number of women reaching adulthood — or middle age — are only now recognising themselves in descriptions of autism. This is a direct consequence of the diagnostic gap: most autistic females without intellectual disability are diagnosed in adulthood.

If you're an adult woman reading this and finding yourself in these descriptions, that recognition is valid. Many women describe a lifetime of anxiety, exhaustion, and a persistent sense of not quite fitting, that only makes sense in retrospect once they understand their own neurology. Because of stereotyped ideas about what autism looks like and who can be autistic, many autistic women struggle to get a diagnosis, receive a diagnosis late in life, or are misdiagnosed with conditions other than autism.

An adult diagnosis — whether NHS or private — follows a similar process to a childhood assessment: GP referral, waiting list, assessment with standardised tools. The right to an autism assessment does not expire with age. You can ask your GP to refer you regardless of when you think this might have started.

What to say to a GP or school

If you're trying to get someone to take your concerns seriously, these framings tend to be more effective than a general "I'm worried":

What you can say to your GP:

• "My daughter presents very differently at home than at school. At school she appears to cope; at home she has significant difficulties with [list specific things: sensory distress, emotional regulation, transitions]. I'd like a referral for an autism assessment."
• "I'm aware that autistic girls are frequently missed because they mask their difficulties in public settings. What I'm describing is happening at home, where she doesn't need to mask."

What you can say to school:

• "I understand you may not be seeing these difficulties in the classroom. Research shows autistic girls often hold things together at school and present differently at home. I'd like to explore whether a SEND referral or additional observation might be appropriate."
• If school has noted anxiety or emotional difficulties, ask directly: "Has autism been considered as part of this picture?"

You can ask school to complete a referral form for the assessment, or to provide written observations to support a GP referral. You don't need school to agree with you; you need them to document what they observe.

Where to go from here

If you're at the beginning of this process, the EHCP and education support guide covers what you're entitled to request from school before and during any assessment process. If sensory differences are part of what you're seeing, the sensory processing hub covers that in detail. And if your daughter's presentation includes significant demand avoidance, the PDA guide is worth reading alongside this one; they often overlap.

For many families the autism-in-girls journey is long and frustrating before it resolves into clarity. You're not imagining it.

This article is part of the Neuroequipped Autism guide. For an overview of the autism assessment process and NHS Right to Choose, see Autism assessment: NHS routes and private options. For sensory differences in autistic children, see the sensory processing hub. For PDA as an autistic profile, see What is PDA?. For anxiety in autistic children, see Why autistic anxiety looks different.

Neuroequipped provides research-grounded information for parents and educators. It is not medical advice. If you have concerns about your child, speak to your GP or paediatrician.