Periods that arrive closer together, then skip a month, then turn up heavier than they have been in twenty years — this is one of the most disruptive and least discussed parts of the transition. Much of it is expected. Some of it needs checking. And almost none of it needs to be endured, because the treatment options here are genuinely good.

Where we stand: Menova is an independent publication. We sell no hormones or products, we are not your doctor, and this is general education, not a diagnosis. A few links below are Amazon affiliate links — Menova may earn a small commission at no extra cost to you.

Why bleeding gets heavier

In a regular cycle, ovulation triggers a balanced rise and fall of estrogen and progesterone, and progesterone stabilizes the uterine lining so it sheds in an orderly way.

In perimenopause, ovulation becomes erratic. In cycles where you do not ovulate, no progesterone is produced — so the lining keeps building under estrogen without the signal that normally organizes it. The result is bleeding that can be heavier, longer, delayed and then dramatic, or all three in the same season.

Estrogen also spikes higher than it did in your thirties before falling, which adds to the lining build-up. This is the mechanism behind almost every complaint in this article.

What is expected

  • Cycles getting shorter, then variable, then skipping — often shorter first, which surprises most women
  • Flow that is heavier or lighter than your old baseline
  • The occasional heavier month with clots
  • A gradual drift toward longer gaps as menopause approaches
  • Periods returning after a two- or three-month gap

Our fuller account of the progression is in irregular periods in perimenopause.

What needs assessment

See a clinician about any of these. Most turn out to be benign — that is the point of checking rather than a reason to skip it:

  • Soaking through a pad or tampon every hour for several hours, or passing clots larger than a coin
  • Bleeding for longer than seven days, or cycles consistently shorter than 21 days
  • Bleeding or spotting between periods, or after sex
  • Any bleeding after twelve months without a period — postmenopausal bleeding, which always needs evaluation, without exception
  • Bleeding that is stopping you leaving the house or requiring you to plan your life around it
  • Symptoms of anemia: breathlessness on stairs, dizziness, exhaustion, pallor, restless legs

Causes range from common and treatable — fibroids, polyps, adenomyosis, thyroid disease, clotting disorders — to, less often, precancerous changes or cancer of the uterine lining. That last possibility is exactly why unusual bleeding is investigated rather than assumed.

The consequence nobody checks for

Iron deficiency. Months of heavy bleeding depletes iron stores, and the result — exhaustion, breathlessness, brain fog, hair shedding, restless legs — reads exactly like a bad menopause year.

The crucial detail: ask for ferritin, not just haemoglobin. Iron stores fall long before anemia appears, so a normal full blood count does not rule it out. This is one of the most commonly missed findings in perimenopausal women, and it is cheap to check and straightforward to correct. See low ferritin in perimenopause.

What a workup involves

  • History and pelvic examination
  • Blood tests: full blood count, ferritin, thyroid function, sometimes a clotting screen, and a pregnancy test
  • Pelvic ultrasound, to look at the uterus and ovaries and measure the endometrial thickness
  • Endometrial biopsy in some cases, particularly with persistent abnormal bleeding or bleeding after menopause — usually a quick outpatient procedure
  • Hysteroscopy to look inside the cavity where a polyp or submucosal fibroid is suspected

Treatment: you have real options

This is the part women most often do not hear:

  • A hormonal IUD, which substantially reduces bleeding for most women — and simultaneously provides contraception and can serve as the progestogen component of HRT. For many women in this decade it is the single most efficient choice; see which contraception in perimenopause
  • Tranexamic acid, taken only on heavy days, which reduces flow without hormones
  • NSAIDs, which reduce both pain and bleeding volume
  • Cyclical progestogen, to bring order to an unpredictable pattern
  • Combined hormonal contraception, where appropriate for your age and risk profile
  • Iron replacement, which treats the consequence — ask about it specifically
  • Treatment aimed at fibroids or polyps, from hysteroscopic removal to embolisation; see fibroids in perimenopause
  • Endometrial ablation or hysterectomy for bleeding that does not respond — with the important note that hysterectomy is not the only option and should not be the first one offered; see hysterectomy and menopause

If you have endometriosis or adenomyosis, the picture and the options shift somewhat; see endometriosis and adenomyosis in perimenopause.

Getting through it day to day

Not treatment, but it makes life manageable while you sort out the treatment: leakproof period underwear as a backstop, and a heating pad for cramps. Keep a spare set of clothes at work — see menopause at work.

Make the appointment count

A short record transforms this conversation. For two or three cycles, note: the start date, days of bleeding, how heavy each day was, whether you passed clots, and any bleeding between periods or after sex.

That turns "my periods are weird" into something a clinician can act on in ten minutes. Our free 30-day symptom tracker has a bleeding column for exactly this, and the free printable visit prep sheet condenses it to one page.

Ask directly: "Could we check a full blood count and ferritin, and arrange a pelvic ultrasound? And what are my options for reducing the bleeding itself?"

The free 2-minute Menova self-check organizes your wider symptom picture — no account, not a diagnosis, and your answers never leave your device.

Related: comparing the treatment options, low ferritin, when iron is not the answer, period products for heavy bleeding, when does my coil come out, and — if you donate blood — the iron problem nobody flags.

One caution on iron. Take it for a confirmed deficiency, not on suspicion — iron overload is harmful, and this is one of the few places where guessing does damage rather than nothing. Ask for ferritin rather than starting a supplement, and if it is low, ask why — see low ferritin in perimenopause, how to actually take iron and our free blood test sheet.

This article is general education, not medical advice. Heavy bleeding, bleeding between periods or after sex, and any bleeding after menopause should be evaluated by a licensed clinician. Seek urgent care for very heavy bleeding with dizziness or fainting.

Sources: ACOG — Perimenopausal Bleeding, NICE NG88 — Heavy Menstrual Bleeding, The Menopause Society, and NHS — Heavy Periods.