A GP guide
Heavy or irregular periods in perimenopause: what is normal and when to see a GP
You pack spare clothes just in case, check every chair before you stand up, and wonder why a cycle you could once set your watch by has stopped making sense. Once you know which changes are expected at this stage and which ones deserve a check, you can stop guessing, plan your weeks again and feel more like yourself.
The short answer
Irregular periods are often one of the first signs of perimenopause, as hormone levels rise and fall unpredictably. Periods can come closer together or further apart, and be lighter or heavier (Healthdirect). Heavy bleeding is common (Healthdirect), and if it affects your daily life it is worth seeing a GP. Low iron can be checked and treated (Healthdirect).
Why do periods change in perimenopause?
In the years before menopause, the ovaries make less oestrogen and progesterone, and the levels swing up and down rather than falling smoothly (Healthdirect). Hormone changes can mean some cycles happen without an egg being released, and periods can then be heavier or last longer (Healthdirect).
The Australian Government describes irregular periods as often one of the first signs of perimenopause (Department of Health). Perimenopause usually happens between 45 and 55 and lasts about 4 to 8 years (Healthdirect). If you are under 45 and your periods have become irregular or stopped, your GP will usually check your hormone levels (Department of Health). Our guide to blood tests in perimenopause explains when testing helps.
Shorter or longer cycles, skipped months and a heavier period after a gap are all common. Bleeding between periods, after sex, or after your periods have stopped is different and should be checked by a GP (Healthdirect).
How heavy is too heavy?
Australian guidance defines heavy menstrual bleeding by its effect on your life, not by a number: bleeding that gets in the way of your physical, emotional, social or material quality of life counts (Australian Commission on Safety and Quality in Health Care). These practical signs help (Healthdirect; Jean Hailes):
| What you notice | What to do |
|---|---|
| Changing a pad or tampon every 1 to 2 hours, or during the night | Book a GP appointment |
| Clots larger than a 50 cent coin | Book a GP appointment |
| Bleeding through clothes, or needing a towel on the bed | Book a GP appointment |
| A period lasting more than 8 days | Book a GP appointment |
| Planning your day around bleeding, or missing work or activities | Book a GP appointment |
| Bleeding suddenly much heavier than usual, or feeling dizzy or weak | Get urgent medical care |
Could heavy periods be making me tired?
Yes, they can. Losing more blood each month can lower your iron. Tiredness, feeling dizzy when you stand, shortness of breath, a racing heart and pale skin can all be signs of iron deficiency or anaemia (Healthdirect).
Australian standards say a woman with heavy bleeding should routinely be checked for iron deficiency and anaemia with a blood test (Australian Commission on Safety and Quality in Health Care). Low iron can be treated with iron supplements or, for some people, an iron infusion (Healthdirect).
Could it be something other than perimenopause?
Sometimes. Fibroids, polyps, adenomyosis, a thickened uterine lining, thyroid problems, bleeding disorders and some medicines, including changes to contraception, can all cause heavier bleeding. Less often, it can be a sign of cancer of the uterus (Healthdirect). Age over 45 is one of the risk factors that prompts closer checking (Australian Commission on Safety and Quality in Health Care). That is why it is worth a proper check rather than assuming it is “just hormones”.
Good to know
You can still get pregnant in perimenopause, so a pregnancy test is sensible if your periods stop (Healthdirect). Contraception is usually advised until you have had no periods for 2 years if you are under 50, or 1 year if you are 50 or older (Jean Hailes; AJGP).
What happens when I see a GP about it?
Your GP will ask about your cycle, how much the bleeding affects your life and your general health, and may examine you. Following the national standard, the first visit usually includes (Australian Commission on Safety and Quality in Health Care):
- A blood test for iron and a full blood count.
- Ruling out pregnancy.
- A pelvic ultrasound if your history suggests it is needed. It is not required for everyone.
- Other checks depending on your story, such as thyroid tests or making sure your cervical screening is up to date.
A period diary makes this conversation much easier. Note the start and end dates, how heavy each day is, the products you use, and how the bleeding affects your daily life (Healthdirect; Jean Hailes). The free perimenopause self-check can help you note your other symptoms too.
What treatments can help?
Medicines are usually the first step, and treatment can often start at your first visit while you wait for an ultrasound or referral (Australian Commission on Safety and Quality in Health Care). Options include:
- A hormonal IUD. The Commission describes it as “currently the most effective medical option for managing heavy menstrual bleeding”, and it also works as contraception (ACSQHC).
- Non-hormonal options that reduce blood flow, taken only on heavy days.
- Hormonal tablets or injections.
- Procedures such as endometrial ablation or removal of polyps or fibroids, with uterine-preserving options usually discussed before hysterectomy.
The right choice depends on your health, your symptoms and whether you need contraception, so it is a decision made with your doctor. For hot flushes and other symptoms, see menopause treatment options in Australia.
When to see a GP
Book an appointment if your periods are heavy, are affecting your daily life, or have changed in a way that worries you (Healthdirect).
See a doctor promptly if you have:
- any bleeding after menopause (12 months or more without a period): it always needs checking (Department of Health)
- bleeding between periods or after sex (Healthdirect)
- very heavy bleeding, or bleeding suddenly much heavier than usual (Healthdirect)
- heavy bleeding with dizziness or weakness: seek urgent care (Healthdirect)
- chest pain or shortness of breath: seek urgent medical attention (Department of Health)
In an emergency, call 000.
Key points
- Irregular periods are often one of the first signs of perimenopause.
- Bleeding is too heavy when it affects your life, or you change protection every 1 to 2 hours, pass clots larger than a 50 cent coin or bleed for more than 8 days.
- Heavy bleeding can lower iron, so a blood test is part of a routine check.
- Bleeding after menopause always needs checking, and bleeding between periods or after sex should be reviewed.
- Effective treatments exist, and many can start at the first visit while tests are arranged.
Frequently asked questions
Is it normal to have heavier periods in perimenopause?
Changes in flow are common in perimenopause, including heavier periods (Healthdirect). If the bleeding affects your daily life or you feel tired or dizzy, see a GP, as treatment and an iron check can help.
Is it normal to have two periods in one month?
Shorter cycles can happen in perimenopause, so periods may arrive closer together (Healthdirect). Bleeding between periods is different and should be checked by a GP (Healthdirect).
What size blood clots are a concern?
Clots larger than a 50 cent coin are one sign of heavy menstrual bleeding and are worth discussing with a GP (Healthdirect; Jean Hailes).
Can I still get pregnant if my periods are irregular?
Yes. Pregnancy is possible until menopause (Healthdirect). Contraception is usually advised until 2 years after your last period if you are under 50, or 1 year if you are 50 or older (Jean Hailes).
Will heavy periods stop on their own?
Periods stop at menopause, but perimenopause usually lasts about 4 to 8 years (Healthdirect), which is a long time to put up with heavy bleeding. Treatment can help at any stage.
Talk it through with a menopause GP
You deserve time to talk it through. Our menopause GPs offer an unhurried 40-minute consult, in person with Dr Natasha Paul at West Pennant Hills, or by video Australia-wide with Dr Priya Ashwath. No referral is needed. Initial 40-minute consult $330, about $202 out of pocket after the $128.35 Medicare rebate.
Book your appointment →Or call us02 9680 9644
This article is general information and is not a substitute for individual medical advice.
Sources
- Australian Commission on Safety and Quality in Health Care: Heavy Menstrual Bleeding Clinical Care Standard (2024 edition)
- ACSQHC: Heavy Menstrual Bleeding Clinical Care Standard, information for consumers and clinicians
- Healthdirect: Heavy periods (reviewed March 2026)
- Healthdirect: Perimenopause (reviewed November 2025)
- Jean Hailes: Heavy periods
- Jean Hailes: Contraception
- Australian Government Department of Health, Disability and Ageing: Perimenopause
- Australian Government: Getting help
- Australian Journal of General Practice (RACGP): Contraception for women over 40 (October 2024)