So…what is menopause…?
Most of us were never taught this. Menopause is not a single event. It is a natural biological transition — a series of overlapping phases that can span more than a decade — during which your ovaries gradually produce less estrogen and progesterone, reshaping how almost every system in your body functions.
Think of menopause less like a door slamming shut, and more like a long, winding corridor. The journey typically begins in your 40s — sometimes earlier — with a gradual shift in hormones that can produce dozens of symptoms before you ever miss a period. By the time your periods stop completely, you may already have been experiencing the transition for years.
The word "menopause" is technically just one moment: the point 12 consecutive months after your final period. But in everyday language, it’s used to describe the whole experience — and this page will help you understand each distinct phase, what is happening in your body during each one, and what to watch for.
It is also worth knowing that not all menopause is the same. For some people, the transition happens abruptly and unexpectedly, triggered by surgery, cancer treatment, or medication. This is called medically induced menopause — and it comes with its own set of considerations that deserve dedicated attention.
Perimenopause
The transition begins — often years before you realise it
The word peri comes from the Greek for “around” — and perimenopause is exactly that: the time around menopause, when your hormones begin their gradual decline. This phase can begin anywhere from 2 to 12 years before your final period, with most people entering perimenopause in their mid- to late-40s, though it can begin as early as the mid-30s for some.
What makes perimenopause particularly hard to recognize is that your periods may continue — and even appear regular — while significant hormonal changes are already underway. Estrogen does not decline in a smooth, predictable curve. It fluctuates: spiking and dropping unpredictably, which is why symptoms can feel erratic, or appear and disappear from week to week.
Because perimenopause is a time of hormonal unpredictability rather than hormonal absence, it is often the phase with the most intense and disruptive symptoms. The brain is acutely sensitive to estrogen, so as levels fluctuate, mood, memory, sleep, and emotional regulation can all be affected — sometimes dramatically.
Perimenopause is a clinical diagnosis based on your symptoms and menstrual history. Blood tests (FSH, oestradiol) can be supportive but are not definitive — hormone levels fluctuate daily, and a single test can easily miss what is happening. Your pattern of symptoms matters more than any single number.
Yes. You remain fertile throughout perimenopause until menopause is confirmed. Contraception is still recommended until you have had 12 consecutive months without a period (or 24 months if you are under 50). Do not assume irregular periods mean you cannot conceive.
Menopause
A single milestone — confirmed only in retrospect
Technically speaking, menopause is not a phase at all — it is a single point in time. Menopause is defined as 12 consecutive months without a menstrual period, with no other medical cause. That date — your final period — can only be identified retrospectively, once a full year has passed. The average age in the UK and US is 51, though anywhere between 45 and 55 is considered within the typical range.
In practical terms, menopause marks the moment your ovaries have stopped releasing eggs and your estrogen production has permanently declined to very low levels. From this point forward, you are no longer fertile. But the body does not suddenly change on this single day — it is the continuation of the transition that began during perimenopause.
What many people don’t realize is that symptoms often intensify around the time of menopause, particularly vasomotor symptoms like hot flashes and night sweats. This is because the hormonal fluctuation of perimenopause gives way to a consistently low level of estrogen — and the body, especially the hypothalamus (the brain’s thermostat), has to recalibrate.
Most menopause symptoms are driven by declining oestrogen. Because estrogen receptors exist throughout the body — in the brain, cardiovascular system, bones, urogenital tissue, and skin — low estrogen affects far more than just your reproductive system. This is why menopause can feel so all-encompassing.
Treatment options range from Hormone Replacement Therapy (HRT) — the most effective treatment for most symptoms — to non-hormonal medications, lifestyle modifications, and complementary approaches. The right path depends on your individual health picture, preferences, and goals. You deserve a proper conversation with a knowledgeable provider.
Post-Menopause
Life after the final period — and why it matters for your long-term health
Post-menopause begins the day after menopause is confirmed and continues for the rest of your life. This phase typically encompasses one third of a woman’s lifespan — in many cases, 30 years or more. Understanding what happens in the body during this time is not just about managing symptoms. It is about protecting your health for decades to come.
For many people, the acute symptoms of perimenopause and menopause — the hot flashes, the night sweats, the erratic moods — do gradually ease in post-menopause as the body settles into its new hormonal baseline. But the consistently low oestrogen of this phase brings its own set of considerations, particularly for bone density, cardiovascular health, cognitive function, and urogenital health.
Estrogen plays a critical role in maintaining bone density. In the first 5–7 years post-menopause, bone loss accelerates significantly. Without intervention, this dramatically increases the risk of osteoporosis and fracture. Bone density screening (DEXA scan), calcium, vitamin D, and weight-bearing exercise are all important considerations.
Before menopause, estrogen offers a degree of protection against cardiovascular disease. Post-menopause, heart disease risk rises substantially and becomes the leading cause of death in women over 60. Blood pressure, cholesterol, weight, and metabolic health all deserve attention during this phase.
Genitourinary Syndrome of Menopause (GSM) — vaginal dryness, thinning of vaginal tissue, urinary urgency, recurrent UTIs, and discomfort during sex — affects up to 80% of post-menopausal women. Unlike hot flashes, GSM does not resolve on its own over time, and is highly treatable with local oestrogen therapy.
Many women report that brain fog lifts in post-menopause as hormones stabilise — and for most, there is no lasting cognitive decline. However, sleep quality, cardiovascular health, and mental engagement all contribute to brain health in this phase. Some research suggests the timing of HRT may influence long-term cognitive outcomes.
Medically Induced Menopause
When the transition arrives suddenly — and without warning
For some people, menopause does not arrive gradually. It happens all at once — triggered by a medical intervention that removes or suppresses ovarian function. This is called medically induced menopause, and it is experienced by people who have undergone bilateral oophorectomy (surgical removal of both ovaries), certain cancer treatments including chemotherapy and pelvic radiation, or who are taking medications that suppress estrogen, such as GnRH agonists used in the treatment of endometriosis or hormone-sensitive cancers.
The physiological experience is the same as natural menopause — the ovaries are no longer producing estrogen — but the abruptness of the change is fundamentally different. In natural menopause, the body has months or years to adapt to gradually declining hormones. In medically induced menopause, hormone levels can drop sharply within days to weeks, producing immediate and often intense symptoms.
Medically induced menopause can occur at any age, including in people in their 20s and 30s. When it occurs before the age of 40, it carries the same health implications as Premature Ovarian Insufficiency (POI) — including elevated risk of osteoporosis, cardiovascular disease, and (where relevant) cognitive changes — and the same guidance around HRT applies unless it is medically contraindicated.
Surgical: bilateral oophorectomy (both ovaries removed).
Cancer treatment: chemotherapy, pelvic radiation, or
hormone-suppressing medications (e.g. tamoxifen, aromatase inhibitors,
GnRH agonists).
Other medication: some treatments for endometriosis,
uterine fibroids, or gender-affirming care.
This depends on the cause. Menopause following surgical removal of the ovaries is permanent. Menopause caused by chemotherapy or certain medications may be temporary — ovarian function can sometimes recover, particularly in younger patients — but this is not guaranteed, and fertility counselling before treatment is strongly advised.
Understanding your body is the first step.
Tracking it is the second.
Menopause affects every system in the body — and every person’s experience is different. The most powerful thing you can do, at any stage of this journey, is to understand your own pattern. When do symptoms occur? How severe are they? What makes them better or worse?
Patterns are evidence. When you walk into a healthcare appointment with four weeks of daily tracked data — symptoms, severity, sleep, cycle, energy — you transform the conversation. You go from describing a feeling to presenting a clinical picture. That matters.
Contact us
Interested in working together? Fill out some info and we will be in touch shortly. We can’t wait to hear from you!