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Frequently Asked Questions
Can the Mirena IUS be used for HRT?
Yes. The 52 mg levonorgestrel intrauterine system (Mirena) is licensed in many countries (including the UK and EU) as the progestogen component of menopausal HRT alongside systemic estrogen. In the US it is FDA-approved for contraception and heavy menstrual bleeding; HRT use is off-label but widely accepted.
Why use an IUS instead of oral progesterone?
Localized delivery to the endometrium provides reliable endometrial protection with minimal systemic progestogen exposure. This avoids progestogen-related mood, breast, and metabolic side effects that some women experience with oral or transdermal progestogens.
A single device provides protection for up to 5 years (8 years for contraception per current FDA labeling).
Is the Mirena IUS FDA-approved?
Yes for contraception and heavy menstrual bleeding. Use for endometrial protection in HRT is off-label in the US but standard of care in much of Europe.
How long does the device last for HRT use?
Most HRT guidelines support 5 years of endometrial protection from a single 52 mg device. After 5 years it should be replaced if estrogen therapy continues.
What are the main side effects?
Irregular bleeding in the first 3–6 months is most common and typically resolves into amenorrhea or very light bleeding. Cramping after insertion, mood changes, acne, and ovarian cysts are less common but recognized.
Insertion-related complications (pain, vasovagal episodes, rare perforation, rare expulsion) are well characterized.
Does it raise breast cancer risk?
Observational data are mixed. Some Scandinavian registry studies suggest a small increased breast cancer risk with levonorgestrel IUS use, similar in magnitude to other progestogens. Absolute risk is small and should be weighed against the benefits of endometrial protection.
Can I get an IUS without seeing a clinician?
No. The IUS requires in-person insertion by a trained clinician (gynecologist, family medicine, or nurse practitioner).
How do I find a clinician who inserts the IUS for HRT?
TruthTides lists HRT-experienced clinicians, including those who insert intrauterine devices for combined estrogen + IUS regimens. Filter by location and specialty.
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