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What is the Mirena Coil?

The Mirena coil is a small device that sits within the uterus (womb). It releases the hormone progesterone locally, into the endometrium (lining of the womb), and makes the womb lining thinner. It has several uses:

  • It’s the treatment of choice for women who have heavy, painful periods because it thins the lining of the womb.
  • It can be used for the progesterone part of Hormone Replacement Therapy (HRT) and provides endometrial protection. It’s particularly useful for women who have experienced irregular, heavy or prolonged bleeding with other types of HRT, or for women who require contraception during peri menopause.

Because progesterone is delivered locally, into the lining of the womb, the majority of women do not experience any systemic side effects with the Mirena coil. In fact, it’s very well tolerated by the majority of women.

Fitting can be slightly uncomfortable. The procedure is similar to a smear test, but you can experience some period type pain during fitting. Once inserted, it can be left in place for up to five years before it needs replacing for HRT purposes. However it can easily be removed sooner, if required.

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