What are the stages of menopause?

Menopause is often spoken about as a single event, but it's more accurately a transition that unfolds across three distinct stages. Understanding which stage you're in matters — it affects how symptoms present, what treatment options are relevant, and what to expect next.

Perimenopause

Perimenopause is the transition phase — the years during which the ovaries gradually produce less oestrogen and progesterone. Menstrual cycles become irregular: sometimes shorter, sometimes longer, sometimes heavier, sometimes lighter. Symptoms including hot flashes, sleep disruption, mood changes, and brain fog typically begin here.

Perimenopause can last anywhere from a few years to over a decade. It typically begins in the mid-40s but can start in the late 30s. Crucially, pregnancy is still possible during perimenopause — irregular cycles don't mean infertile.

Menopause

Menopause is not a phase — it's a single point in time: 12 consecutive months without a menstrual period, with no other medical cause. It can only be confirmed retrospectively. The average age of natural menopause is 51, though a normal range spans roughly 45–55.

Surgical menopause — following removal of the ovaries — causes an immediate and abrupt menopause regardless of age, typically producing more severe symptoms than natural menopause because the hormonal change is sudden rather than gradual.

Postmenopause

Postmenopause is everything after that 12-month mark. Oestrogen levels are now consistently low. Many vasomotor symptoms (hot flashes, night sweats) diminish over the postmenopause years for most people, though this is variable — some continue to experience them for a decade or more.

The longer-term health considerations of postmenopause include bone density (oestrogen protects against bone loss) and cardiovascular health. These are worth discussing with a GP regardless of symptom severity — they're often not top of mind when the focus has been on managing immediate symptoms during perimenopause.

Why the distinction matters

The stage you're in affects treatment decisions. HRT is most commonly used during perimenopause and early postmenopause. The appropriateness of different hormone preparations and routes depends partly on where you are in the transition. Knowing your stage — and being able to describe your symptom pattern accurately — makes clinical conversations more productive.