What is the 52mg Levonorgestrel Intrauterine System (IUS)?
The 52mg Levonorgestrel Intrauterine System (IUS)—commonly known by brand names such as Mirena, Levosert, or Benilexa—is a small, T-shaped device that is inserted into the womb (uterus) to release a low dose of the hormone levonorgestrel over time. It provides long-term, reversible contraception and is also highly effective in managing heavy menstrual bleeding (menorrhagia), painful periods (dysmenorrhea), and as endometrial protection during oestrogen-based Hormone Replacement Therapy (HRT).
How does it work?
The 52mg Levonorgestrel IUS operates through three main mechanisms:
- Thickening Cervical Mucus: This makes it more difficult for sperm to enter the womb, reducing the
chance of fertilisation. - Thinning the Lining of the Uterus (Endometrium): This makes the womb less suitable for
implantation. - Partial Ovulation Suppression: In some women, it may also prevent ovulation, although this is not its
primary action.
What is it used for?
The 52mg Levonorgestrel IUS is a versatile device, commonly used for:
- Contraception: Over 99% effective for up to 5 years, or even 8 years depending on clinical guidelines.
- Heavy Menstrual Bleeding (Menorrhagia): Proven to significantly reduce menstrual flow.
- Painful Periods (Dysmenorrhea): Can lessen pain associated with menstruation.
- Endometrial Protection during HRT: Prevents thickening of the womb lining when taking oestrogen.
- Management of Endometriosis and Adenomyosis Symptoms: Helps alleviate associated pain and bleeding.
Benefits of the 52mg Levonorgestrel IUS:
- Over 99% effective at preventing pregnancy
- Long-lasting protection for 5 years (or up to 8 years depending on usage)
- Menstrual bleeding often becomes lighter, shorter, or may stop completely
- Fertility returns quickly after removal
- Convenient—no need to remember a daily pill
- Safe for use during breastfeeding
- May reduce the need for surgical interventions in certain gynaecological conditions
Possible side effects:
Most side effects tend to improve after the initial few months:
- Irregular bleeding or spotting—common during the first 3–6 months
- Hormonal side effects: These may include mood changes, headaches, breast tenderness, and acne
- Cramping or discomfort after insertion
- No periods (amenorrhea): This is common and completely safe
Rare but Serious Complications:
- Perforation of the womb: Occurs in about 1 in 1,000 insertions
- Expulsion (device falling out): More likely in the first few weeks after insertion
- Pelvic infection: Usually within the first 20 days if it occurs
Who can use it?
The 52mg Levonorgestrel IUS is suitable for most women, including:
- Those who have not had children
- Women who are breastfeeding
- Those seeking non-oestrogen options for contraception or endometrial protection
- Women requiring long-term treatment for heavy menstrual bleeding
When It May Not Be Suitable:
- If you have unexplained vaginal bleeding
- Diagnosed with certain cancers (e.g., breast or womb)
- Have an active pelvic infection
- Suffer from liver disease
What is the insertion like?
- Usually done in a clinic or GP surgery
- Takes just a few minutes
- You may experience cramping or discomfort—pain relief is recommended
- It is often easier to fit during your period
- You’ll typically be asked to return for a check-up after 4–6 weeks
After insertion:
- Light bleeding and cramping are normal for a few days
- It is advised to avoid tampons, sex, and swimming for 24 hours
- You will be shown how to feel the strings to check placement
What if I want it removed?
- The device can be removed at any time by a trained professional
- Fertility returns immediately after removal
- If you do not plan to conceive, use alternative contraception 7 days before removal to prevent pregnancy
| Myths | Fact |
| It causes infertility | Fertility returns quickly after removal |
| It causes abortions | It prevents pregnancy – it does not terminate it |
| You can feel it during sex | Neither you nor your partner should feel it |
| It’s only for women with children | It’s suitable for most people, even pre-pregnancy |
At WWWW, we provide expert consultation, safe insertion, and ongoing monitoring of the 52mg Levonorgestrel IUS to ensure your comfort and confidence in your contraceptive choice.
Book your consultation today to discuss if the 52mg Levonorgestrel IUS is right for you.