Perimenopause: The Transition Nobody Talks About

Perimenopause is the transitional period leading up to menopause, during which hormone levels, particularly oestrogen and progesterone, begin to fluctuate and eventually decline. It can begin as early as the mid-thirties, though the forties is more typical, and it lasts on average four to eight years. Throughout this time, periods may become irregular, symptoms may come and go unpredictably, and many women have no idea what's happening because perimenopause is so rarely discussed or taught.

The lack of public literacy around perimenopause means that many women spend years attributing their symptoms to stress, depression, anxiety, or simply getting older, before the hormonal picture becomes clear. Getting that picture earlier matters because there is a great deal that can be done to support wellbeing during this transition.

What perimenopause actually feels like

The symptom list for perimenopause is longer than most people expect. Hot flushes and night sweats are the most widely recognised, but they're not always present in the early stages. Many women first notice changes in mood, sleep, and cognitive function. Brain fog, difficulty concentrating, and memory lapses are among the most distressing symptoms for women who have not connected them to hormonal change. Anxiety, often appearing in someone who has not previously been an anxious person, is another common early sign. Low mood, irritability, and a reduced sense of resilience are also frequently reported.

Sleep disruption, often driven by night sweats or simply by hormonal changes to sleep architecture, compounds almost everything else. Joint aches, changes in skin and hair, weight redistribution particularly around the abdomen, and changes in libido are also associated with perimenopausal hormonal shifts. The wide range of symptoms, and the fact that they fluctuate rather than presenting consistently, is part of why perimenopause is so often missed.

"Many women spend years feeling unlike themselves before anyone mentions perimenopause. The conversation coming earlier would change a great deal."

Why hormones fluctuate so much in perimenopause

During perimenopause, the ovaries become less responsive to FSH and LH. Ovulation becomes less regular and eventually stops. Because oestrogen production is tied to ovulation, levels become erratic, sometimes spiking higher than usual before falling, which creates the unpredictable symptom pattern that many women experience. Progesterone production also declines as ovulation becomes less frequent, often before oestrogen falls significantly, which means many women become relatively oestrogen-dominant in the early perimenopause phase.

This hormonal variability is why symptoms can be so inconsistent from week to week or month to month. It also means that hormone tests, particularly a single oestrogen measurement, are not always a reliable way to confirm perimenopause. Clinical assessment of symptoms, in the context of age and cycle changes, is often more informative.

When to seek support

There is no threshold of severity required before seeking support. If perimenopausal symptoms are affecting sleep, mood, work, or relationships, that's sufficient reason to speak with a GP about options. HRT is the most effective treatment for perimenopausal symptoms and is now recommended for most women as a first-line approach, having been significantly rehabilitated in medical opinion following earlier safety concerns. Lifestyle measures including exercise, dietary attention, and sleep hygiene also make a meaningful difference and are worth implementing regardless of other treatment choices.

Perimenopause is a significant transition that deserves proper attention and support. Getting informed early, rather than waiting until symptoms become severe, is the most useful approach.