Mirena insertion - everything you need to know
What is a Mirena?
A Mirena is a small device inserted into the uterus that releases a hormone called progesterone. This hormone reduces the monthly growth of the lining of the uterus (endometrium), reduces the heaviness of periods, and may also help reduce period pain.
What is a Mirena used for?
Reducing abnormal bleeding
Reducing pelvic pain associated with periods
Protecting the uterine lining during hormone therapy
Contraception
How effective is a Mirena for reducing periods?
Research has found that:
90% of patients report a reduction in period pain
70% of patients report their periods are lighter
30% of patients report they stop having periods altogether
How does the Mirena prevent pregnancy?
Your cervical mucous becomes thickened and prevents sperm from entering the uterus
It thins the uterine lining, and in turn this
Inhibits sperm from reaching and fertilizing the egg
How is the Mirena inserted?
Insertion can be performed in our Adelaide-based outpatient clinic, without anaesthetic. It is a similar process to performing a PAP smear (now called a ‘cervical screening test’ or CST). On the day of insertion, you must bring your Mirena IUD with you. Paracetamol is recommended 30-60mins prior to insertion. Your Doctor will perform a pregnancy test prior to insertion.
If required, the Mirena can also be inserted in an operating theatre, under anaesthetic.
Our woman-centered, female Adelaide Gynaecologists are highly experienced and knowledgeable in Mirena insertion.
Are there any risks with having a Mirena?
As with any medical procedure, there are risks involved, and these include:
Discomfort at the time of insertion. If insertion is uncomfortable the procedure can be stopped immediately and rebooked to be performed in the operating theatre under anaesthetic at a later date
Dizziness during and after placement, which usually subsides within 30 minutes
The risk of infection or damage to the uterus at the time of insertion is low, less than 1%
Approximately 3% of Mirenas fall out spontaneously, which is why it’s important to have a follow-up appointment after insertion
The risk of pregnancy with a Mirena is 1 in 1000, and the risk of ectopic pregnancy (pregnancy outside of the uterus) is also slightly increased
In rare circumstances, a Mirena can cause headaches, breast tenderness and changes in libido
Pelvic inflammatory disease (PID), which is a severe pelvic infection and is usually secondary to sexual transmission.
What happens after insertion?
It is normal to experience some mild cramping and pelvic discomfort after a Mirena is inserted. Ibuprofen, a heat bag, and rest are recommended. To reduce the risk of infection, no tampons, sexual intercourse, baths or swimming is recommended for at least 48hrs.
It is also normal to experience irregular bleeding for the first 6-12 weeks after insertion. The bleeding isn’t usually heavy and settles soon after. If you experience any concerning symptoms, please contact us.
A repeat examination is recommended at 8 weeks to check that the Mirena is correctly positioned.
Frequently Asked Questions
Q. Will I be able to feel the Mirena?
A. You will not be able to feel the device and it’s not something you or your partner would normally feel during sex.
Q. How long does it ‘last’, and if I want to get pregnant, what then?
A. The Mirena’s effectiveness lasts for up to 5 years and is removed in a procedure similar to insertion. Fertility returns rapidly after removal.
Q. Can a Mirena be used if I am breastfeeding?
Yes, the Mirena is safe to use when breastfeeding and is unlikely to affect the quality or amount of breast milk produced.
If you’ve any further questions, please reach out and our caring, warm and knowledgeable Gynaecologists will assist you.