Perimenopause: The Early Signs Many Women Don't Recognise at First
Reviewed by the Kamagra AUS Pharmacy Team on 24 November 2025 · Next review June 2027
Summary
Perimenopause can start years before periods actually stop, often with symptoms that don't immediately register as hormone-related. Here's what to watch for.
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Perimenopause is the transition leading up to menopause, and it can start years before periods actually stop — which is exactly why many women experience its early signs without immediately connecting them to hormones at all.
What perimenopause actually is
Perimenopause is the period during which oestrogen and progesterone levels begin fluctuating and gradually declining, ending once you've gone twelve months without a period (the point that's medically defined as menopause itself — see our guide on what age menopause starts). It isn't a single event; it's a gradual, often uneven process.
Changes in your cycle — often the first sign
For many women, the earliest noticeable sign is a change in the menstrual cycle itself: periods becoming shorter, longer, heavier, lighter, or less predictable than before. This is often dismissed as ordinary variation at first, particularly if the change is gradual rather than sudden.
Sleep disruption and night sweats
Hot flushes and night sweats are widely recognised as menopause symptoms, but they frequently begin during perimenopause, sometimes years before periods stop, and can disrupt sleep well before any other sign is obvious.
Mood changes
Increased irritability, anxiety, or low mood that feels different from your usual pattern can be an early hormonal sign, though it's easy to attribute to stress or circumstances instead — and often it's genuinely a mix of both.
Other easily-missed signs
Brain fog, joint aches, changes in libido, and early vaginal dryness (see our guide on vaginal dryness after menopause, which can begin in perimenopause too) are all reported by many women but don't automatically get connected to hormones, since none of them are exclusively menopause-related on their own.
How long this stage typically lasts
Perimenopause commonly lasts around four years, though it varies considerably between individuals — some women move through it in a year or two, others experience it for closer to a decade.
When to see a doctor rather than assume it's just stress
If you're noticing a cluster of these changes together, particularly cycle changes alongside sleep or mood shifts, it's worth raising with a doctor rather than managing each symptom separately or assuming it's unrelated stress. A doctor can also discuss options such as hormone therapy if symptoms are significantly affecting your day-to-day life.
This article is general information, not medical advice. Perimenopause symptoms vary widely between individuals — a doctor can help confirm what's happening and discuss options if symptoms are affecting your quality of life.
Frequently asked questions
How early can perimenopause symptoms start?+
Perimenopause can begin years before periods actually stop, sometimes in the late 30s or early 40s, though the timing varies considerably between individuals.
What's usually the first noticeable sign of perimenopause?+
A change in the menstrual cycle — periods becoming shorter, longer, heavier, lighter or less predictable — is often the earliest sign many women notice.
How long does perimenopause typically last?+
On average around four years, though it can range from just a year or two to closer to a decade for some individuals.
When should perimenopause symptoms be discussed with a doctor?+
If you're noticing several changes together — cycle changes alongside sleep disruption, mood shifts, or hot flushes — it's worth a doctor's assessment, particularly if symptoms are affecting your daily life.
Kamagra AUS Health Editorial Team
Plain-English health writing from our in-house editorial team — sourced to the TGA, healthdirect and each medicine's product information, and focused on how Australians actually access and use medicines safely.
How our content is written & reviewedSources for the medical information in this guide
- Australasian Menopause Society — Clinical-society guidance on menopause and hormone therapy for an Australian audience.
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