Last checked September 2026 against 8 sources · Editorial policy
Mirena and hormonal IUDs in perimenopause
Mirena and other hormonal IUDs suit many women in perimenopause. The 52 mg hormonal IUD is over 99% effective, makes periods lighter or stops them, and can later provide the progestogen part of HRT alongside estrogen. Fitted after 45, it can stay in until 55 for contraception. It contains no estrogen, so it won't stop hot flashes on its own. The copper IUD is hormone-free but can make periods heavier.
A hormonal IUD controls heavy bleeding, prevents pregnancy and can be the progestogen part of HRT. How it hides perimenopause signs and when to remove it.
Mirena in perimenopause: expectation vs reality
What people often expect
“Mirena causes hot flashes, and IUDs are for younger women”
What the evidence shows
The hormonal IUD releases a progestogen, not estrogen, and hot flashes aren't among its listed side effects: hot flashes on Mirena are usually perimenopause itself. Far from being only for younger women, UK menopause experts describe the hormonal IUD as especially useful in the 40s, because it treats heavy periods and flooding and can double as part of HRT.
How a hormonal IUD works in perimenopause
How the hormonal IUD works
A hormonal IUD, or IUS, is a small plastic T-shape placed in the uterus that releases levonorgestrel, a progestogen, directly into the uterus. It stops pregnancy and thins the uterine lining, which is why periods become lighter, shorter and less painful, and often stop altogether. It doesn't contain estrogen. Fertility returns to its previous level as soon as it's removed.
Mirena for heavy perimenopause periods
Heavy periods and flooding are common in the 40s, and the hormonal IUD is one of the most effective treatments. NICE suggests it as the first treatment for heavy periods when no cause is found, when fibroids are smaller than 3 cm and don't distort the uterus, or with adenomyosis. It significantly reduces period pain and bleeding. It also provides contraception at the same time, which most women in perimenopause still need.
Learn more →Mirena as part of HRT
If you still have a uterus and take estrogen for menopause symptoms, you need a progestogen to protect the uterine lining. The 52 mg hormonal IUD, such as Mirena, can provide it, alongside estrogen tablets, patches, gel or spray. The NHS says it has fewer side effects than other progestogens used in HRT and suits women who get heavy bleeding on HRT. Used as part of HRT, it needs replacing every 5 years.
Learn more →Mirena and hot flashes
The hormonal IUD contains no estrogen, so it can't cause or cure the estrogen swings behind hot flashes. Hot flashes aren't on the NHS list of IUS side effects; headaches, acne, sore breasts and mood changes are reported, but there isn't enough evidence to say the IUS causes them. If you get hot flashes with an IUD in your 40s, perimenopause is the likely reason, and adding estrogen as HRT treats them.
Perimenopause symptoms with an IUD
Because a hormonal IUD can stop periods, you lose the most obvious sign of where you are in perimenopause. Look at other symptoms instead: hot flashes, night sweats, sleep problems, mood changes, vaginal dryness. Progestogen-only methods can be used until 55, and your doctor may suggest a blood test to help decide how much longer you need contraception. Keeping a simple symptom diary helps you and your doctor decide when to add HRT.
Do IUDs have estrogen?
No. Hormonal IUDs contain only a progestogen, levonorgestrel, released in the uterus. Copper IUDs contain no hormones at all and work by releasing copper. That's why an IUD alone won't treat hot flashes, and why it can be combined with estrogen HRT when you need both contraception and symptom relief. If you want contraception without any hormones at all, the copper IUD is the option, as long as your periods are not already heavy or painful.
IUDs in perimenopause by the numbers
From the studies on this page
effective: both hormonal and copper IUDs
Over 99%
is how long the 52 mg hormonal IUD lasts as the progestogen part of HRT before it needs replacing
5 years
Bar scaled to a 12-year reference span
Until 55
3 to 6 months
Rules on how long an IUD can stay in are longer for women over 40 or 45, because fertility is lower. Check the rules for your specific device with your doctor or nurse.
Which IUD is best for perimenopause?
52 mg hormonal IUD (Mirena, Levosert, Benilexa)
Good for
Licensed for contraception for 8 years, or until 55 if fitted after 45. Treats heavy periods and can provide the progestogen part of HRT. The usual choice in perimenopause.Watch
As part of HRT it needs replacing every 5 years. Spotting for the first few months.19.5 mg hormonal IUD (Kyleena)
Good for
Licensed for contraception for 5 years. Lower dose.Watch
Not the type used as the progestogen part of HRT.13.5 mg hormonal IUD (Jaydess)
Good for
Licensed for contraception for 3 years. Smallest dose.Watch
Shorter lifespan, and not used as part of HRT.Copper IUD
Good for
Hormone-free and over 99% effective. If fitted after 40, it can stay in until menopause.Watch
Can make periods heavier or more painful, so it may not suit you if periods are already a problem.
When to see a doctor about your IUD
Urgent: Pain that painkillers don't help, fever, or unusual discharge with an IUD
Get an urgent doctor's appointment. Pelvic infection is a rare risk, usually in the first 3 weeks after fitting.
Urgent: You can't feel the threads, or think you might be pregnant
Get an urgent doctor's appointment and use condoms until it's checked. The IUS can move or come out, usually within 3 months of fitting.
Irregular or heavy bleeding for more than 6 months after fitting
See a doctor or nurse for a check-up.
Bleeding after a long spell with no periods
See a doctor. New bleeding after a long gap on a hormonal IUD needs checking.
Mirena and IUDs in perimenopause: questions women ask
Is Mirena good for perimenopause?
For many women, yes. It's over 99% effective, makes periods lighter or stops them, treats heavy bleeding, and can later provide the progestogen part of HRT. Fitted after 45, it can stay in until 55. It won't treat hot flashes on its own.
Does Mirena cause hot flashes?
Hot flashes aren't a listed side effect of the hormonal IUD, which contains progestogen but no estrogen. Hot flashes on Mirena in your 40s are usually perimenopause. Adding estrogen HRT, with the IUD as the progestogen, treats them.
Do IUDs have estrogen?
No. Hormonal IUDs release only a progestogen, and copper IUDs contain no hormones. That's why an IUD can be safely combined with estrogen HRT when you need both contraception and relief from hot flashes. Hormonal IUDs release their progestogen mainly inside the uterus.
What is the best IUD for perimenopause?
The 52 mg hormonal IUD, such as Mirena, usually fits best: it lasts until 55 if fitted after 45, treats heavy periods, and can be part of HRT. The copper IUD suits women who want no hormones and don't have heavy periods.
How do I know I'm in perimenopause if my IUD stopped my periods?
Watch other symptoms: hot flashes, night sweats, sleep changes, mood swings, vaginal dryness. Age matters too. Your doctor may use a blood test to guide how long to continue contraception, but you can keep a hormonal IUD until 55 regardless.
Can an IUD be used for menopause?
The 52 mg hormonal IUD can provide the progestogen part of HRT, protecting the uterine lining while you take estrogen for symptoms. Used this way, it needs replacing every 5 years. On its own, it doesn't treat menopause symptoms.
What are the benefits of an IUD in perimenopause?
Highly effective contraception without daily pills, lighter or absent periods, relief from heavy bleeding and period pain, and the option to use it as part of HRT. Fertility returns straight away if it's removed. Many women also like that it removes the need to think about contraception for years.
What are the side effects of Mirena?
Spotting and irregular bleeding in the first 3 to 6 months, harmless ovarian cysts, and occasionally recurring thrush. Headaches, acne, sore breasts and mood changes are reported, but it's unclear whether the IUS causes them. Rare risks include infection, the IUS moving, and damage to the uterus.
Can Mirena help perimenopause symptoms?
It helps some of them. The hormonal IUD treats heavy and painful periods, which are common in perimenopause, and provides contraception. It does not treat hot flashes, night sweats or vaginal dryness, because it contains no estrogen. For those, estrogen HRT can be added, with the IUD protecting the uterine lining.
How long can Mirena stay in after 45?
For contraception, a 52 mg hormonal IUD fitted after 45 can stay in until 55, when contraception is no longer needed. If you use it as the progestogen part of HRT, it needs replacing every 5 years. A copper IUD fitted after 40 can stay in until menopause.
Sources
- Women's Health Concern (British Menopause Society). Contraception for women over the age of 40. Fact sheet, 2025.
- NHS. What is an IUS (intrauterine system) or hormonal coil?
- NHS. What is an IUD (intrauterine device) or copper coil?
- NHS. Side effects and risks of an IUS or hormonal coil.
- NICE. Heavy menstrual bleeding: assessment and management (NG88).
- NHS. Types of hormone replacement therapy (HRT).
- Crandall CJ, Mehta JM, Manson JE. Management of Menopausal Symptoms: A Review. JAMA. 2023;329(5):405-420.
- NHS. Symptoms of menopause and perimenopause.
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