This has become one of the most common questions women bring to a GP in their forties, and for good reason.
You cannot hold a thought. You reread the same paragraph. Your working memory has gone. Systems that held your life together for twenty years have quietly stopped working.
Two explanations fit. They are not mutually exclusive.
The question that separates them
When did it start?
ADHD is a neurodevelopmental condition. It is present from childhood. It does not appear at 44.
Perimenopausal cognitive change is new. It arrives in your forties, fluctuates, and often tracks with your cycle.
That sounds like a clean test. In practice it is not, because of what happens next.
Why so many women are diagnosed now
ADHD in girls and women has been badly under-recognised. The recognised picture was a disruptive boy. The inattentive presentation — quiet, disorganised, daydreaming, chronically late, but not disruptive — was routinely missed.
So a great many women reached adulthood with undiagnosed ADHD and built elaborate compensating systems. Lists. Alarms. Over-preparation. Working late to finish what should have taken an afternoon.
Those systems take effort to maintain. Perimenopause removes the reserve that funds them.
The result is a woman who coped for forty years and suddenly cannot — and who is often told it is stress.
What points toward ADHD
Think back before your forties:
- School reports mentioning potential, daydreaming, or not applying yourself
- A lifelong pattern of losing keys, phones, wallets
- Difficulty finishing things you started with enthusiasm
- Chronic lateness, despite genuinely trying
- Time blindness — an hour and four hours feeling similar
- Needing deadline pressure to start anything
- Interrupting, or finishing people's sentences
- Intense focus on things that interest you, and none at all for things that do not
That last one surprises people. ADHD is not an absence of attention. It is difficulty regulating where it goes.
If several of those describe you at twelve as well as at forty-five, that is worth exploring.
What points toward perimenopause
- It genuinely started in the last few years
- It fluctuates — bad weeks, then a clear one
- It is worse premenstrually
- It sits alongside night sweats, cycle change, joint aches or mood change
- It is worse when your sleep has been broken
- Word-finding difficulty is prominent
Perimenopausal cognitive change is also generally transitional. Research following women through and past the transition finds performance recovering afterwards.
Side by side
| More like ADHD | More like perimenopause | |
|---|---|---|
| Started | Childhood | Last few years |
| Pattern | Consistent lifelong | Fluctuates, comes in waves |
| Tracks with cycle | Not particularly | Often clearly |
| Other physical symptoms | No | Night sweats, cycle change, aches |
| Trajectory | Lifelong | Usually improves after the transition |
| Family history | Often present | Not relevant |
When it is both
Common, and the most important scenario to get right.
A woman with lifelong undiagnosed ADHD hits perimenopause. Her compensating systems fail. She presents at 45 unable to function and genuinely cannot tell whether this is new.
Both need addressing. Treating the perimenopause restores some reserve but does not resolve lifelong executive function difficulty. An ADHD diagnosis explains a great deal but does not touch night sweats.
What to do
Write the timeline. Not just now — going back. What you were like at school, at twenty-five, at thirty-five. This is the single most useful thing you can bring.
Track against your cycle for two months. A clear premenstrual pattern points one way.
Get the blood tests first. Thyroid, ferritin, B12, vitamin D.
Ask about both. A GP can start the conversation on both fronts. ADHD assessment in Australia is usually through a psychiatrist or a paediatrician for younger patients, and waiting lists can be long — so asking early matters.
Do not accept an either/or. If a doctor picks one without exploring the other, that is worth a second opinion.
Our symptom check records the perimenopause side in about two minutes. Take it alongside your own timeline of the ADHD questions above, and a doctor has both halves.
Related
Brain fog in perimenopause covers the cognitive changes in more depth, including why they frighten women more than any other symptom.