The Stages of Menopause Explained: Perimenopause Through Postmenopause

“Menopause is not a disease — it's a planned change, like puberty. And just like puberty, we should be educated on what's to come years in advance, rather than the current practice of leaving people on their own with bothersome symptoms and too much conflicting information.”

If you’ve tried to figure out where you are in the menopause transition and ended up more confused than when you started, you’re not imagining it. The stages of menopause are real and well-defined in clinical research, but the way they get talked about in everyday language flattens distinctions that actually matter for how you’re treated. This guide walks through the four stages the way specialists actually use them — what each one means biologically, what symptoms tend to cluster in each, and what to ask for at each point.

The framework you’ll read about here is called STRAW+10. It’s the global standard for staging reproductive aging, and it’s the same framework your menopause-trained clinician is using behind the scenes.

Key takeaways

• The stages of menopause are defined by the STRAW+10 framework: late reproductive, early perimenopause, late perimenopause, menopause (a single day), early postmenopause, and late postmenopause.
• Perimenopause is diagnosed by cycle changes, not by lab tests. NICE explicitly advises against routine FSH testing in women over 45 with typical symptoms.
• Menopause itself is a retrospective diagnosis — the 12-month anniversary of your final menstrual period.
• The early postmenopausal years are when many women experience the most intense vasomotor symptoms and the fastest bone loss.
• Knowing your stage shapes what treatments fit, what risks to monitor, and what to expect next.

What the stages of menopause actually are

The stages of menopause describe the biological journey from regular ovulatory cycles to permanent loss of ovarian function. The framework most specialists use comes from the Stages of Reproductive Aging Workshop +10 criteria (STRAW+10), published in Menopause in 2012 and adopted as the international standard. STRAW+10 divides the transition into seven stages spanning the late reproductive years through late postmenopause, defined by a combination of cycle pattern, endocrine markers, and clinical symptoms.

For practical purposes, those seven STRAW+10 stages collapse into four phases most clinicians and patients care about: the late reproductive stage, perimenopause (early and late), menopause itself, and postmenopause (early and late). That’s the structure this article uses.

The stages are not arbitrary. They map to distinct hormonal patterns and predict which symptoms cluster where, which treatments work, and which long-term risks become relevant. Knowing your stage is not just a labeling exercise — it shapes the entire clinical conversation.

Stage 1: Late reproductive stage

The late reproductive stage is the period before perimenopause clinically begins. Your cycles are still regular. You haven’t started missing periods or noticing dramatic cycle length changes. But below the surface, ovarian reserve is declining, FSH is rising in the early follicular phase, and the first subtle shifts are underway.

Many women in this stage notice things they don’t yet connect to hormones: shorter cycles, heavier flow, new or intensified premenstrual symptoms, the occasional night sweat in the week before a period, slightly worse sleep, more difficulty bouncing back from a hard week. These changes are easy to attribute to stress, parenting demands, or a job that’s gotten harder — and often they really are. But hormonal change in this stage is also real and physiologic.

The late reproductive stage can begin in the late 30s for some women, more commonly in the early 40s. There’s no specific date it starts. STRAW+10 describes it as a stage of subtle changes in cycle length and rising early-follicular FSH while regular cycles are otherwise maintained.

What this means practically: if you’re 38 to 44 and noticing things feel different, you’re not making it up. You’re also not yet in perimenopause by the formal definition. The most useful thing to do at this stage is establish a baseline — track your cycles, note which symptoms cluster where, and have a conversation with a clinician if anything is interfering with your life. If you’re concerned about timing, our explainer on what age perimenopause starts covers the full picture.

Stage 2: Early perimenopause

“Hormone therapy for menopause is rife with confusion, fear, misunderstanding, and outright misinformation. Even doctors — who are often relying on long-debunked research — can be at a loss to help women make educated choices for their health and well-being.”

Perimenopause officially begins when your cycle length starts varying by more than seven days from your usual pattern, and that pattern of variability persists. This is the entry point STRAW+10 uses to mark the start of the menopausal transition.

For most women, early perimenopause looks like this: cycles that used to be predictable now run shorter or longer in a pattern you can’t predict. You might have a 22-day cycle followed by a 35-day cycle. The flow itself may also change — heavier, lighter, more clotting, more spotting between periods. Sleep often starts to fragment. Hot flushes or night sweats may begin. Mood symptoms — irritability, low mood, anxiety — often start or intensify in this stage.

Lab testing is generally not useful here. FSH levels fluctuate so dramatically across perimenopause that a single blood draw rarely reflects what’s actually happening. NICE Guideline NG23 (updated November 2024) explicitly recommends against routine FSH testing in women over 45 with typical menopausal symptoms because the result almost never changes management. The diagnosis is clinical: symptom pattern plus cycle changes plus appropriate age.

Early perimenopause typically lasts several years for most women. SWAN data — the longest-running cohort study of the menopause transition — suggest an average of around 4 years for the early stage on its own, though there is meaningful variation in both directions.

This is the stage where many women first start asking whether what they’re experiencing is “real.” It is. The mistake at this stage is assuming nothing can be done because periods are still happening. Effective treatment for perimenopausal symptoms exists — hormonal, non-hormonal prescription, and behavioral — and the threshold for starting is whether symptoms are affecting your life, not whether you’ve reached the formal definition of menopause yet.

Stage 3: Late perimenopause

Late perimenopause begins when you have gone 60 or more days without a period. You’re not yet menopausal — that requires a full 12 months of amenorrhea — but you’re closer. STRAW+10 marks this as a distinct stage because the hormonal pattern shifts: estradiol becomes more erratic, FSH stays persistently elevated more of the time, and symptoms often intensify.

For many women, the late perimenopausal phase is the most symptomatically intense part of the entire transition. Hot flushes and night sweats often peak here. Sleep can become significantly worse. Mood symptoms — including the highest-risk window for new or recurrent depression in some women — tend to cluster in this late perimenopausal phase. Cognitive symptoms (word-finding difficulty, slowed processing, attention lapses) are often most pronounced here too.

The reason for the symptom intensity is biological: estrogen levels in late perimenopause aren’t just lower than they were premenopausally. They’re erratic. Wide swings up and down stress the systems that have adapted to a relatively stable hormonal environment for decades. Your body isn’t tracking a smooth descent. It’s reacting to volatility.

Late perimenopause typically lasts 1 to 3 years before the final menstrual period, though it can be shorter or longer. For some women it’s compressed; for others, this phase drags on with long stretches between periods that feel like they should “finally” be the last one but aren’t.

This is also the stage when The Menopause Society’s 2022 Hormone Therapy Position Statement makes the strongest case for considering hormone therapy in appropriately selected women: vasomotor symptoms are often most disruptive, you’re well within the “window of opportunity” for safest use, and the alternatives (continuing to function poorly for two more years until the symptoms taper on their own) are rarely acceptable to the women experiencing them.

Stage 4: Menopause (the single day)

Menopause itself is not a phase. It’s a date — the 12-month anniversary of your final menstrual period. Because the diagnosis is retrospective, you don’t know you’ve reached menopause until a year after the fact.

The average age of natural menopause in the United States is 51. Most women reach it between 45 and 55. Reaching it before 45 is classified as early menopause; before 40, as premature ovarian insufficiency, which is a separate clinical entity with different management implications.

Nothing dramatic happens biologically on the day of menopause itself. It’s a clinical marker, not a physiologic event. The hormonal changes have been underway for years, and they continue after the marker. The reason the 12-month rule exists is statistical: by 12 months of amenorrhea, the probability of another period is very low (though not zero, especially around the perimenopausal-postmenopausal border).

Two practical implications. First: as long as you’re having periods, even irregular ones, pregnancy is still biologically possible, and the contraception conversation matters until you cross the 12-month threshold. Second: bleeding that returns after a full 12-month interval is postmenopausal bleeding and warrants prompt evaluation, regardless of how light or brief — it’s not “another period,” and it has clinical implications that need to be ruled out.

If you want a deeper walk-through of what “menopause” actually refers to and what duration looks like, our pillar on how long menopause lasts covers the SWAN data on symptom duration in detail.

Stage 5: Early postmenopause

Early postmenopause covers the first several years after the final menstrual period, typically defined in STRAW+10 as approximately the first 5 to 8 years. This is one of the most clinically important phases of the transition, for two reasons that don’t always get connected.

First, vasomotor symptoms often remain intense in early postmenopause. The SWAN study reported a median total VMS duration of 7.4 years, with a median of 4.5 years occurring after the final period. Women whose symptoms started later in the transition often experience their most disruptive hot flushes during early postmenopause, not before.

Second, this is the window of fastest bone loss. In the first 5 to 7 years after the final period, women lose bone density at an accelerated rate. By some estimates, women lose up to 20% of bone mass during this window. The accelerated phase tapers, but the bone you’ve lost doesn’t fully come back, and the choices you make here — calcium, vitamin D, weight-bearing exercise, hormone therapy where appropriate, screening — meaningfully shape your fracture risk decades later.

Early postmenopause is also when many women experience the first noticeable genitourinary symptoms — vaginal dryness, painful sex, urinary urgency, recurrent UTIs. Unlike hot flushes, these symptoms typically don’t improve on their own. Per The Menopause Society’s 2020 GSM Position Statement, genitourinary syndrome of menopause affects roughly half of postmenopausal women and tends to worsen over time without treatment.

The early postmenopausal years are the second half of what the Menopause Society and NICE both describe as the “window of opportunity” for hormone therapy. Both bodies endorse hormone therapy as first-line for moderate-to-severe vasomotor symptoms in appropriately selected women who are under 60 or within 10 years of their final menstrual period — and the safety profile is most favorable in this window. If hormone therapy is something you want to consider, this stage is when the conversation matters most.

Stage 6: Late postmenopause

“I've had problems with perimenopause. And no one's taking me seriously. I'm seeing doctor after doctor and I'm not getting any relief. The same story, over and over again — in real life and on social media.”

Late postmenopause is the rest of your life. STRAW+10 distinguishes it from early postmenopause because the hormonal and clinical patterns shift again. By this point, estradiol levels have settled at a low postmenopausal baseline, vasomotor symptoms have eased for the majority of women, and the accelerated bone loss phase has tapered.

What persists or worsens in late postmenopause is different. Genitourinary syndrome of menopause typically becomes more pronounced — sometimes appearing for the first time in this stage in women who had no symptoms during the transition itself. Cardiovascular risk profiles shift with sustained estrogen deficiency, including changes in lipid patterns and vascular function. Cognitive concerns intensify for some women, though the cognitive symptoms tied specifically to the transition usually resolve in early postmenopause.

For most women, late postmenopause is biologically calmer than the years immediately around the final period. It’s also the phase in which the long-term cardiovascular and bone consequences of the transition become most clinically relevant — which means screening, monitoring, and risk-factor management matter more, not less, even when symptoms have eased. Our guide on what happens after menopause covers the long-term picture in detail.

What the stages don’t tell you

A staging framework is useful but imperfect. STRAW+10 was developed primarily for natural menopause in women with regular prior cycles, and several important groups don’t map cleanly onto its categories.

Women on hormonal contraception or hormone-suppressing medications don’t have observable cycle changes, so the cycle-based criteria don’t apply. Staging for these women relies more heavily on symptom pattern and age.

Women with PCOS, irregular cycles from other causes, or thyroid disease may have baseline cycle irregularity that makes the STRAW+10 cycle criteria harder to apply. Diagnosis still depends primarily on clinical judgment.

Women who undergo surgical menopause — removal of both ovaries before natural menopause — skip the perimenopausal phases entirely. The hormonal drop is abrupt, symptoms often more intense, and management decisions differ. Our guide on surgical menopause covers what to expect.

Women going through breast cancer treatment, particularly with tamoxifen or aromatase inhibitors, experience treatment-induced menopausal symptoms that don’t follow the standard staging. Many treatment options that work for natural menopause are contraindicated, and the clinical pathway differs.

Women under 40 whose periods stop are evaluated for premature ovarian insufficiency rather than fitted into the standard staging. POI has different long-term implications and different treatment guidelines, anchored in the ESHRE 2016 POI guideline.

In all of these cases, the stages remain a useful mental scaffold, but the formal STRAW+10 criteria are applied loosely or replaced by clinical judgment.

What treatment fits at which stage

Stage shapes what treatments are appropriate, and the major treatment decisions often hinge on which stage you’re actually in.

Late reproductive and early perimenopause. Most women in these stages benefit most from symptom-targeted treatment: tracking, lifestyle modification, sleep hygiene, treatment of specific symptoms (for example, low-dose hormonal contraception for irregular bleeding plus partial hot flush control). Hormone therapy in its classical menopausal form is generally not used here because women are still cycling; combined oral contraceptives are often more appropriate when contraception is also wanted.

Late perimenopause and early postmenopause. This is the central window for menopausal hormone therapy in appropriately selected women, per both the Menopause Society and NICE. Vasomotor symptoms tend to be at their most disruptive, the safety profile of systemic hormone therapy is most favorable, and the cumulative bone and cardiovascular benefit of starting in this window appears strongest in the landmark trials.

Late postmenopause. Systemic hormone therapy initiation in women who are 10+ years past their final period or over 60 carries a different risk-benefit calculation, and decisions become more individualized per the 2022 position statement. Local vaginal estrogen for genitourinary symptoms, however, is considered safe across postmenopause without the same time-limited window, including for many women who can’t use systemic hormones. Bone-protective medications, cardiovascular risk management, and cancer screening are central to care in this phase.

For women who can’t or don’t want to use hormone therapy at any stage, evidence-based non-hormonal options exist — including certain SSRIs and SNRIs, gabapentin, the NK3-receptor antagonist fezolinetant (Veozah), and cognitive behavioral therapy. Our guide to natural remedies for menopause covers the evidence honestly.

What this means for you

If you’re trying to figure out where you sit in this framework, three questions will get you most of the way there:

• Are your cycles still regular? If yes, you’re either premenopausal or in the late reproductive stage.
• Have your cycle lengths started varying by more than seven days from your usual pattern? If yes, you’re in early perimenopause.
• Have you gone 60+ days without a period? If yes, you’re in late perimenopause. Have you gone a full 12 months? You’re postmenopausal.

The reason this matters: each stage has its own typical symptom pattern, its own risk profile, and its own set of treatment options. A woman in early perimenopause who’s still cycling regularly has different needs from a woman three years postmenopausal whose hot flushes are peaking. Both deserve treatment. Neither benefits from a one-size approach.

Knowing your stage also helps you advocate. If a clinician dismisses your symptoms as “too young” for perimenopause, or insists on ordering FSH levels that NICE explicitly advises against, you’ll have the framework to ask for what you actually need.

When to talk to your doctor

Reasonable triggers for a conversation include:

• Cycle changes that are interfering with your life or your contraception planning
• Hot flushes or night sweats that disrupt sleep, work, or daily function
• New or worsening mood symptoms during your 40s or early 50s
• Vaginal dryness, painful sex, or urinary symptoms at any postmenopausal age
• Periods stopping before age 45 (and especially before age 40)
• Bleeding more than 12 months after what you thought was your final period
• Heavy or unusually irregular bleeding at any point during the transition

If you want a structured way to prepare for that conversation, our guide on talking to your doctor about menopause covers what to bring, what to ask, and how to advocate for yourself.

Frequently asked questions

What are the stages of menopause in order?

Late reproductive stage, early perimenopause, late perimenopause, menopause (the single day at 12 months of amenorrhea), early postmenopause, and late postmenopause. The framework is called STRAW+10 and is the international standard for staging.

How do I know what stage I’m in?

Stage is determined primarily by cycle pattern and age, not by lab tests. Regular cycles with subtle changes suggests the late reproductive stage. Cycle length variability of 7+ days from your normal pattern indicates early perimenopause. Going 60+ days without a period indicates late perimenopause. A full 12 months without a period defines menopause. Anything after that is postmenopause.

Can you skip a stage of menopause?

You can effectively skip the perimenopausal stages if you undergo surgical menopause (removal of both ovaries), chemotherapy-induced menopause, or pelvic radiation. In these cases, the hormonal drop is abrupt and symptoms are often more intense.

Which stage has the worst symptoms?

For most women, late perimenopause and early postmenopause are the most symptomatically intense phases. Hot flushes and night sweats often peak in this window, mood vulnerability is highest in late perimenopause, and sleep disruption is common throughout. There’s significant individual variation — some women experience their most difficult symptoms in early perimenopause, others not until early postmenopause.

Do you need hormone tests to diagnose what stage you’re in?

For most women over 45 with typical symptoms, no. NICE explicitly recommends against routine FSH testing because the result almost never changes management. Diagnosis is clinical: cycle pattern, symptom pattern, and age. Testing has a clearer role in women under 45 with suspected premature ovarian insufficiency and in some cases of atypical presentation.

How long does each stage of menopause last?

The late reproductive stage often runs several years and has no fixed start. Early perimenopause averages around 4 years. Late perimenopause averages 1 to 3 years. Menopause is a single day. Early postmenopause runs approximately 5 to 8 years. Late postmenopause is the rest of your life. There’s substantial individual variation in every phase.

Sources

• Harlow SD, Gass M, Hall JE, et al. Executive summary of the Stages of Reproductive Aging Workshop +10: addressing the unfinished agenda of staging reproductive aging. Menopause. 2012;19(4):387-395. (STRAW+10 staging framework.)
• Avis NE, Crawford SL, Greendale G, et al. Duration of menopausal vasomotor symptoms over the menopause transition. JAMA Internal Medicine. 2015;175(4):531-539. SWAN cohort.
• The Menopause Society. The 2022 Hormone Therapy Position Statement of The North American Menopause Society. Menopause. 2022;29(7):767-794.
• The Menopause Society. The 2020 Genitourinary Syndrome of Menopause Position Statement of The North American Menopause Society. Menopause. 2020;27(9):976-992.
• Webber L, Davies M, Anderson R, et al. ESHRE Guideline: management of women with premature ovarian insufficiency. Human Reproduction. 2016;31(5):926-937.
• National Institute for Health and Care Excellence. Menopause: identification and management (NG23). Updated November 2024.
• Bromberger JT, Kravitz HM. Mood and menopause: findings from the Study of Women’s Health Across the Nation (SWAN) over 10 years. Obstetrics and Gynecology Clinics of North America. 2011;38(3):609-625.