IUS

What is it?

  • The IUS is a small plastic device, shaped like a 'T', which slowly releases the progestogen hormone.
  • A hormone coil called Mirena.
  • A specially trained doctor or nurse will insert it into your womb.
  • An IUS can be used for up to five years.

How effective is an IUS?

Out of every 100 women who use an IUS, less than 1 woman will get pregnant in a year.

Where can I get an IUS fitted?

Only a specially trained doctor or nurse should fit an IUS. Family planning clinics, GUM clinics, doctors and some GPs can fit an IUS if they have been specially trained. Find your nearest service in the website directory.

You will need to talk to your GP or the doctor or nurse at the sexual health clinic to see if the IUS is the right method of contraception for you. They will ask you about your family's medical history and any illness or operations you have had. For some reasons the IUS may not be the best option for you.

What are the advantages of an IUS?

The advantages of using an IUS include:

  • It is a highly effective method of contraception.
  • It works for up to five years.
  • It doesn't interfere with sex.
  • A few months after it has been put in, your periods usually become much lighter and shorter.
  • An IUS can reduce or get rid of period pain.
  • Your normal levels of fertility return quickly after the IUS is removed.

What are the disadvantages of an IUS?

  • Some women feel faint or sick for a short time when a coil is fitted.
  • Most women have irregular bleeding for the first six months. This can be irritating, but should disappear.
  • Some women experience hormone side-effects such as headaches, acne and breast tenderness.
  • Some women may develop cysts on their ovaries. These are not dangerous and do not usually need to be treated. Usually there are no symptoms, but some women may experience pelvic pain. The cysts usually go away without treatment.
  • The womb can push the IUS out or it may move out of place. This is most likely to happen soon after it has been put in. Your doctor or nurse will teach you how to check the threads of your IUS every month so you can check the IUS is still in place.

It is very uncommon, as an IUS should be put in by a specially trained doctor or nurse. However, occasionally the IUS might go through the womb or cervix when it is fitted. This may cause pain, but often there are no symptoms. If this happens, the IUS may have to be removed by surgery.

You should have your IUS checked by a doctor or nurse four to six weeks after it is put in, and then once a year after this. If you feel unwell after it's fitted or if you think it has moved out of place (the doctor/nurse will show you how to check this) contact your GP or staff at a clinic immediately for advice.

If you have any concerns or wish more information on the IUS speak to your GP or staff at a GUM or Family Planning Clinic. You will find more detailed information on the IUS at the link below.

Links

Family Planning Association: www.fpa.org.uk