Mirena IUS
Learn more about the Mirena Intra Uterine System
What is the Mirena IUS?
The Mirena IUS is an intra uterine device that was originally developed as a long term, and reversible method of contraception. It is a T-shaped device which is inserted into the womb cavity and releases the progestogen hormone Levonorgestrel.
The Mirena and HRT
It is a highly reliable form of contraception, but can also provide very good endometrial protection in women taking oestrogen replacement, replacing the need to take oral progestogen and avoiding the monthly bleed.
The progestogen released by the Mirena is mostly concentrated in the womb with very little absorption into the blood stream and so can avoid the side effects of progestogens. This is especially helpful for women who are progesterone intolerant and experience severe side effects with progesterone.
The Mirena can provide adequate endometrial protection in women taking HRT for five years.
How is it fitted?
It is usually fitted in the clinic as an outpatient. Most women experience mild pain or discomfort which may be followed by some cramping for a few hours afterwards. It is advisable to take am analgesic such as Ibuprofen or Nurofen one hour prior to the insertion to minimise any pain.
Side effects
Some bleeding is not uncommon in the first 3-6 months, this is usually light, in some rare cases it can be a little heavy but it usually lessens with time.
The level of progesterone in the bloodstream is much lower than with the pill, so side effects such as tender breasts, headaches and acne are much less likely. If they occur, they usually settle within a few months. On very rare occasions severe PMS type may persist but these symptoms disappear within a few days of the removal.
The Mirena IUS should not cause any weight gain. Very rarely the Mirena can be expelled completely or partially. There is a very small risk of infection following the insertion, and prophylactic antibiotics are sometimes given to protect against this small risk.
Book your appointment
Book your appointment with our specialist team
Dr Neale Watson
Consultant Gynaecologist
Dr Mike Savvas
Consultant Gynaecologist
Dr Marilena Nicou
GP Menopause specialist
Frequently Asked Questions
What side-effects can I expect with the Mirena?
The Mirena is usually well tolerated and side effects are rare. A small number of women may experience side effects, particularly in the first few months. These include breast tender headaches, acne, bloating and symptoms similar to PMS which usually gradually improve with time. Some women may experience irregular bleeding in the first few months, but this too usually settles within 3 to 6 months.
Can I still have a Mirena if I have never had children?
Most women who have never had any children or had caesarean section deliveries can still have a Mirena fitted as an outpatient procedure. However, if on examination your doctor feels that your cervix is too tightly closed you may be advised to have it fitted under general anaesthetic.
What to Expect From Your Visit
The first visit will entail a comprehensive consultation, examination and hormone profile testing if required. Our highly qualified menopause specialists will guide you through the process of choosing the safest and most effective treatment to manage your symptoms.
A prescription will usually be issued, at the first visit if appropriate and a follow-up is arranged after 2-3 months to assess the effectiveness of the treatment and make changes as required. Our clinic allows for remote consultation for those who cannot make an in-person follow-up. This may be via a video or telephone call.
Additional services such as pelvic ultrasound scan, coil fittings, smear tests and bone density scan (DEXA) may also be performed as appropriate. We can also arrange for you to have a mammogram if you need one.