So…what is menopause? | Meno.Pause With Me
Meno.Pause With Me

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 oestrogen and progesterone, reshaping how almost every system in your body functions.

Here’s what nobody tells you: symptoms can begin years before your periods stop, they can affect your heart, brain, bones, mood, skin, and sleep — and they are frequently misattributed to stress, anxiety, or ageing. Understanding what is actually happening is the first step to getting the right support.

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.

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Phase One

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 recognise is that your periods may continue — and even appear regular — while significant hormonal changes are already underway. Oestrogen 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.

“My periods were still coming every month. I had no idea that the anxiety, the 3am wake-ups, and the rage that came from nowhere were all connected to my hormones.” — a common story

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 oestrogen, so as levels fluctuate, mood, memory, sleep, and emotional regulation can all be affected — sometimes dramatically.

Common symptoms during perimenopause
Irregular periods Heavy or lighter bleeding Hot flashes Night sweats Sleep disruption Mood changes Anxiety Irritability / rage Brain fog Memory lapses Fatigue Low libido Breast tenderness Joint pain Headaches Heart palpitations Weight changes
How is it diagnosed?

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.

Can I still get pregnant?

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.

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Worth knowing: Many perimenopause symptoms are misdiagnosed as depression, anxiety disorder, or burnout — and treated accordingly, without hormones ever being considered. If you are in your late 30s or 40s and experiencing mood changes, sleep problems, or cognitive shifts alongside any menstrual changes, it is worth raising perimenopause with your provider.
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Phase Two

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 oestrogen 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.

“Menopause is not the end of something. It is the confirmation that a transition has already been happening — and it can be the beginning of a clearer, more supported path forward.”

What many people don’t realise 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 oestrogen — and the body, especially the hypothalamus (the brain’s thermostat), has to recalibrate.

Symptoms most commonly associated with menopause
Hot flashes Night sweats Vaginal dryness Urinary changes Sleep disruption Fatigue Low mood Brain fog Loss of libido Joint pain / stiffness Thinning hair Skin changes Weight redistribution Palpitations Dizziness
What causes the symptoms?

Most menopause symptoms are driven by declining oestrogen. Because oestrogen receptors exist throughout the body — in the brain, cardiovascular system, bones, urogenital tissue, and skin — low oestrogen affects far more than just your reproductive system. This is why menopause can feel so all-encompassing.

What are my options?

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.

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A note on premature and early menopause: Menopause before age 40 is called Premature Ovarian Insufficiency (POI). Menopause between 40 and 45 is called early menopause. Both carry additional health implications — particularly for bone and cardiovascular health — and are generally considered an indication for HRT until at least the average age of menopause (51), regardless of symptom severity.
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Phase Three

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.

“Post-menopause is not an ending. For many women, it is a season of clarity, renewed energy, and a deepened relationship with their own body — when supported with the right information and care.”
Bone health

Oestrogen 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.

Heart health

Before menopause, oestrogen 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 health

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.

Cognitive health

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.

What to watch for in post-menopause
Vaginal dryness / discomfort Recurrent UTIs Urinary urgency or leaking Reduced libido Sleep changes Bone or joint pain Weight gain around the abdomen Dry skin / hair changes Mood shifts Fatigue
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Post-menopause health is proactive health. Annual check-ins with a healthcare provider who understands menopause are valuable — even when you feel well. Bone density, cardiovascular risk, and hormonal health all benefit from monitoring and early action. If you are experiencing any new vaginal bleeding in post-menopause, seek medical attention promptly, as this always warrants investigation.
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A Different Path

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 oestrogen, 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 oestrogen — 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.

“Nobody told me that my treatment would put me into menopause. I woke up from surgery and my body had changed overnight. I had no framework for what was happening to me.” — a common experience

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.

Causes

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.

Is it reversible?

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.

Symptoms — often sudden and intense
Severe hot flashes Night sweats Vaginal dryness Acute mood changes Sleep disruption Brain fog Joint pain Fatigue Loss of libido Anxiety / depression Palpitations Memory changes Urinary symptoms
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If you are navigating medically induced menopause: you deserve specialist support. Seek out a menopause-literate provider — ideally one with experience in your specific context (post-cancer, post-surgical, or medication-induced). The British Menopause Society, The Menopause Society (formerly NAMS), and organisations like Ovacome and Breast Cancer Now offer specialist guidance. Your experience is valid, your symptoms are real, and effective treatment exists.
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HRT after cancer: For many people with a history of hormone-sensitive cancers, HRT has historically been contraindicated — but this guidance is evolving. For some cancer types (including some breast cancers), the evidence around HRT is now more nuanced than blanket avoidance. A detailed conversation with your oncologist and a specialist menopause provider is essential to understand your individual risk and options.

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.

Meno.Pause With Me
www.menopausewithme.com
Created by Carla Ward · Menopause Doula

This page is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider about your individual health circumstances. © Meno.Pause With Me

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