IUS (Mirena)

The IUS is a small T-shaped plastic device that is put into your uterus and releases progestogen hormone which is similar to the hormone naturally produced.

It thickens the mucus in the cervix preventing sperm reaching the egg and thins the lining of the uterus so it is less likely to accept a fertilised egg.

• The IUS is over 99% effective- more effective than female sterilisation
• It works for 3-5 years depending on type
• Your periods may become lighter, shorter and may stop completely
• It can be used if you are breastfeeding
• Your fertility will return to normal as soon as the IUS is removed

• There is a small risk of infection
• The IUS does not protect you against sexually transmitted infections so you may need to use condoms too.

The IUS is fitted by a trained doctor or nurse.  This can be done at either your GP practice or local sexual health clinic

Information before coil insertion

Information after coil insertion