UK evidence cited in parliamentary material says it takes an average of 14 months for women to link their symptoms to perimenopause. Women are still missing perimenopause because they are looking for menopause: periods may still be coming, symptoms get blamed on stress or ageing, and months can pass before anyone connects the dots. Symptoms can appear during perimenopause, menopause and after menopause has ended, which is why the transition is so often missed in practice.
Where the confusion starts
Perimenopause is the transition before menopause, not the same point in time. The practical problem is that many women still have periods, sometimes irregular ones, so they do not recognise the change as hormonal at all. That leaves sleep disruption, mood changes, anxiety, brain fog, fatigue, digestive changes, irregular bleeding and lower libido sitting in the wrong box, labelled as workload, burnout, or another health problem.
What perimenopause can look like
Sleep disturbance, mood changes, anxiety, brain fog and other symptoms can affect daily life across perimenopause and menopause. Symptoms may also vary by ethnic background, which matters because a one-size-fits-all picture of menopause leaves some women less likely to recognise their own symptoms.
Perimenopause is more plausible when several of these changes cluster together, especially if they are new for you or are starting to affect day-to-day life:
- irregular or changed periods
- sleep problems that do not settle
- anxiety, low mood or irritability that feels different from your usual baseline
- brain fog, forgetfulness or reduced concentration
- fatigue that is out of step with your routine
- headaches, digestive issues or palpitations that appear alongside other changes
- a drop in libido or vaginal discomfort
None of those symptoms proves perimenopause on its own. But when they arrive together, or fluctuate in step with cycle changes, they deserve a menopause-aware conversation rather than dismissal.
How long women are waiting
A separate study of 1,000 women is the source of the average delay, showing how long the gap between first symptoms and recognition can last.
If you spend a year assuming the problem is stress, overwork or poor sleep hygiene, you are less likely to keep track of patterns, less likely to ask the right questions, and more likely to be told the symptoms are unrelated or not serious enough. The result is a trial-and-error experience that can run on long after symptoms have become disruptive.
What the research gap looks like
A 2022 online survey of perimenopausal women, recorded in UCL Discovery, shows that attitudes and knowledge about menopause remain uneven. In parallel, wider discussions of women’s knowledge and attitudes to menopause continue to point to patchy understanding rather than settled confidence.
The Menopause Charity says over half the population will go through menopause in their lifetime, yet many still struggle to spot the signs and symptoms of perimenopause and menopause.
What good support looks like at work
Concentration, sleep, confidence and attendance can all be affected, so workplace awareness is part of the health response. The House of Commons Women and Equalities Committee published its menopause-and-workplace report on 28 July 2022.
NHS England followed with guidance for line managers and colleagues on supporting NHS staff through menopause, published on 1 November 2022. Employers should have early and regular follow-up conversations with workers to understand their needs and identify adjustments. In practice, that can mean simple measures such as flexible hours, lighter workloads during flare-ups, better ventilation, access to drinking water, uniform adjustments and manager training.
When to see your GP
If your periods have changed and you are also dealing with sleep disruption, mood swings, anxiety, brain fog, fatigue, heavier or irregular bleeding, headaches or a drop in libido, book a GP appointment. That is especially important if symptoms are interfering with work, relationships or day-to-day life, or if you are unsure whether something else could be causing them.
A GP can help rule out other causes and discuss whether the pattern fits perimenopause. Keep a symptom diary before the appointment if you can, noting when symptoms happen, how they relate to your cycle, and which parts of life they are affecting. That record helps turn vague concern into a clearer clinical conversation.