Why so many women reach forty before anyone mentions ADHD

A striking number of women are assessed for ADHD in their thirties and forties, often after a child is assessed first and the description sounds uncomfortably familiar.

This is not because ADHD arrives in adulthood. It is present from childhood by definition. What changes is whether anyone notices.

The stereotype does the damage

The classic picture — a boy who cannot sit still and disrupts the class — describes one presentation of one part of the condition. Inattentive ADHD, with less visible hyperactivity, tends to look like daydreaming, disorganisation and quiet underachievement. It inconveniences the child far more than it inconveniences the classroom, so it does not get referred.

Girls are also, on average, better at masking: consciously copying the organisational habits other people appear to have naturally. Masking works, and it is exhausting, and it hides the very thing that would have prompted an assessment.

Why it surfaces later

Compensation has a capacity limit. It usually holds until demand rises sharply — a more senior role, a first child, a degree, a bereavement, or the loss of a partner who had quietly been carrying the admin.

• Strategies that worked for decades stop being enough, seemingly overnight
• The exhaustion is read as burnout, and rest does not fix it
• Anxiety and low mood arrive, and get treated as the primary problem
• Hormonal change can intensify symptoms, which is why perimenopause is a common trigger for seeking help

What this means for an assessment

A late presentation needs an assessor who is looking for the effort behind the presentation, not just the presentation. Being articulate, employed and organised on the day does not rule anything out — often it is evidence of how much work has gone into appearing that way.

It also means childhood evidence can be thin. School reports may say "capable but does not apply herself" rather than anything clinical. That is still useful information, and a skilled assessor knows how to read it.

If you were the bright child who somehow never quite delivered, that is worth mentioning at assessment. It is a more common history than people expect.