Perimenopause & Menopause: A Practical Guide

Perimenopause is the transition leading up to your final menstrual period. Menopause itself is a single point in time — twelve consecutive months without a period. Everything before that is perimenopause, and everything after is post-menopause. The transition typically begins in the mid-to-late forties, though it can start in the late thirties, and lasts four to eight years on average. The defining feature is not low estrogen. It is erratic estrogen. During perimenopause, estrogen does not glide downward — it fluctuates unpredictably, sometimes reaching levels higher than in your thirties, then dropping sharply. Progesterone declines earlier and more steadily as ovulation becomes less consistent. That volatility is why perimenopause often feels worse than post-menopause. After menopause, hormones settle at a low but stable level and many symptoms ease. It is the swinging, not the destination, that produces most of the misery.

The most common experience women report is being tested, told everything is normal, and sent home. The problem is structural. A blood test captures one moment in a process defined by variation. FSH rises and falls across the transition; estradiol swings week to week. A normal result on Tuesday tells you nothing about Friday. This is precisely why perimenopause is a clinical diagnosis — based on age, cycle change and symptom pattern — rather than a laboratory one. What testing is genuinely useful for is excluding the conditions that mimic perimenopause: • Hypothyroidism causes fatigue, weight gain, low mood, cold intolerance, hair thinning and cycle change. The overlap is nearly complete, and it is straightforward to treat. • Iron deficiency causes fatigue, breathlessness, poor concentration and hair shedding. It is extremely common in women with the heavy, erratic bleeding typical of perimenopause — and ferritin is rarely checked. Both are common. Both are missed. Both are worth ruling out before attributing everything to hormones.

Hot flushes and night sweats are the symptoms everyone knows. They are frequently not the ones that cause the most disruption. • Sleep disruption — often the first symptom, and the one that drives much of the rest. Poor sleep worsens mood, cognition, insulin sensitivity and appetite regulation. • Mood changes — new or worsening anxiety, irritability, and a sense of being less resilient. Perimenopause carries a genuinely elevated risk of depressive episodes, particularly in women with a history of PMDD or postpartum depression. • Brain fog — word-finding difficulty and slower recall. This is real, well documented, and generally improves after the transition. • Joint and muscle aches — frequently attributed to age rather than falling estrogen. • Weight redistribution toward the midsection, driven by reduced insulin sensitivity and declining muscle mass. • Genitourinary symptoms — vaginal dryness, painful sex, urinary urgency and recurrent UTIs. Unlike hot flushes, these do not improve with time; they progress without treatment, and they are the most under-reported of all. • Heavier, more erratic periods before they stop entirely — which is also why iron deficiency is so common here.

Sleep first. It is usually the highest-yield intervention, because so much else downstream depends on it. Addressing night sweats, sleep timing, alcohol and evening light often produces more improvement than any supplement. Protein and resistance training. Muscle mass declines through the transition unless actively defended, and muscle is the main site of glucose disposal. This is why the approach that worked in your thirties genuinely stops working — and why eating less usually backfires by accelerating muscle loss. More protein and heavier lifting is the honest answer. Bone protection, starting now. Bone loss accelerates sharply in the five to seven years around the final period. Intervention during perimenopause has far more leverage than the same effort a decade later. Progressive resistance training, adequate protein, vitamin D dosed to a measured level, and vitamin K2. An honest conversation about hormone therapy. The original Women's Health Initiative findings were widely over-generalised, and subsequent analysis substantially revised the risk picture — particularly for women starting near the onset of menopause. It is highly effective for hot flushes, night sweats and genitourinary symptoms and supports bone density. It is not right for everyone. It deserves a real discussion rather than a reflexive refusal or a blanket recommendation. Targeted support where indicated: magnesium for sleep and migraine, omega-3s, and botanical options discussed against your individual risk profile.