What Changes at Forty, and What to Do About It

Perimenopause is the transition leading to the final period, and it typically begins between 40 and 45, though it can start earlier. It lasts an average of four to eight years. Menopause itself is a single point, defined retrospectively as twelve months after the last period, and in Europe it arrives at a median age of around 51.

What makes the transition confusing is that oestrogen does not fall smoothly; it fluctuates, often wildly, and it is the fluctuation rather than the eventual decline that produces most of the symptoms. This is why a blood test taken on one day frequently comes back normal, and why so many women are told nothing is wrong.

The symptoms that are not hot flushes

Vasomotor symptoms are the famous ones and roughly three quarters of women experience them. The others are less discussed and more likely to be misattributed:

• Sleep disruption, particularly waking at three or four in the morning, often preceding any other symptom by years.
• Anxiety appearing for the first time in a woman who has never been anxious, and low mood that does not respond to the usual things.
• Brain fog, word-finding difficulty and a striking loss of confidence at work.
• Joint aches, frozen shoulder and new stiffness in the morning.
• Changes in cycle length and flow, which are the actual diagnostic signal.
• Vaginal dryness and urinary symptoms, which affect a majority, respond extremely well to local treatment, and are raised by almost nobody.

Most women arrive at perimenopause with no vocabulary for it, which is why so many of them are told they are simply tired and stressed.

Hormone therapy, as the evidence now stands

The Women’s Health Initiative results in 2002 were reported in a way that caused a generation of women to stop or never start hormone therapy, and subsequent reanalysis has substantially revised that picture. The current position of the major menopause societies is that for most women under 60, or within ten years of menopause, and without specific contraindications, the benefits of hormone therapy for symptom relief and bone protection outweigh the risks.

The details matter: transdermal oestrogen, as a patch or gel, does not carry the clotting risk associated with older oral preparations, and body-identical progesterone is used alongside it for anyone with a uterus. Risks are real but modest and depend on age, formulation and duration, which is precisely why this is a conversation with a doctor rather than a decision from an article.

Local vaginal oestrogen is a separate matter and is safe for almost everyone, including many women who cannot take systemic hormones. It is dramatically under-prescribed.

What helps regardless

Strength training twice a week, for bone and muscle, both of which are lost faster in this decade. Protein at every meal. A fixed wake time, because sleep is often the first thing to go and it makes everything else worse. Reducing alcohol, which is a common trigger for both flushes and three o’clock waking. And cognitive behavioural therapy, which has good evidence for hot flushes and for the sleep disruption, and is available without a prescription pad.

How to prepare for the appointment

Keep a symptom diary for two cycles: dates, sleep, mood, cycle length, flushes. Write down your three most disruptive symptoms in order. Ask specifically about transdermal oestrogen, about local vaginal treatment, and about what to expect in the first three months. If you are dismissed, ask for a referral to a menopause specialist, and know that being dismissed is common and is not a verdict on whether something is happening.

This is not decline, and framing it as such has done a great deal of harm. It is an endocrine transition with a beginning and an end, most of it treatable, and the women who come through it best are almost always the ones who found the words for it early.