Perimenopause rarely announces itself. It arrives as a scattering of small, seemingly unrelated changes that only look like a pattern once you see them side by side.
It's the transition leading up to menopause, when the ovaries produce less oestrogen and progesterone, not in a smooth decline but in swings that can last months or years. It usually begins in your forties, though it can start in your mid-thirties or as late as your fifties.
This won't diagnose you. Only a doctor can do that, sometimes with bloodwork. What it can do is help you see your own pattern, so you walk into that appointment with something clearer to say than "something feels off."
Section 01
Your cycle
0 / 6Why this happens. As the ovaries' supply of maturing eggs declines, they respond less predictably to the brain's signals. Ovulation becomes irregular, which is why cycle changes usually show up before anything else.
Section 02
Heat and flushing
0 / 3Why this happens. Oestrogen helps regulate the brain's internal thermostat. As it fluctuates, that thermostat becomes more sensitive and triggers a rapid cool-down response: the flush, the sweat, sometimes a racing heart.
Section 03
Sleep and energy
0 / 4Why this happens. Night sweats are one driver, but progesterone also has a calming, sleep-promoting effect of its own. Less of it can mean lighter, more broken sleep even without any heat at all.
Section 04
Mood and focus
0 / 6Why this happens. Oestrogen interacts with serotonin and other messengers that regulate mood and mental clarity. It's the fluctuating, rather than simply the falling, that tends to be most disruptive here.
Section 05
Body changes
0 / 9Why this happens. Oestrogen receptors sit all over the body: skin, hair follicles, joints, vaginal tissue, and where fat is stored. So its decline shows up well beyond the reproductive system.
Section 06
Bladder and pelvic floor
0 / 3Why this happens. The bladder and urethra carry oestrogen receptors too. As that tissue thins it loses some elasticity and support, which can mean urgency, more infections, or leaking.
Section 07
Timing and family pattern
0 / 3Why this matters. Symptoms mean more in the right life stage. Perimenopause tends to begin around the age your mother or older sisters reached it, and it builds gradually rather than overnight.
Section 08 · Worth a separate conversation
Things that usually point somewhere else
0 / 17Why this section matters. Perimenopause is common enough at this age that it can become a catch-all explanation, and that is exactly when something else gets missed. Thyroid conditions, anaemia, gynaecological or cardiac issues can overlap on symptoms like fatigue. Ticking anything here doesn't rule perimenopause out. It simply deserves its own conversation with your doctor.
Updates as you tick
Your pattern
This is a self-check for your own awareness, not a diagnosis and not medical advice. Perimenopause can only be confirmed by a qualified healthcare provider. If anything here concerns you, please book an appointment.