Intra Uterine Device (IUS)

  • A small plastic device containing progestogen that is fitted inside the uterus (womb)
  • Often referred to as the ‘Mirena’ or the ‘hormone coil’
  • IUS provides contraception for 5 years

The IUS is over 99% effective at preventing pregnancy. It provides no protection against sexually transmitted infections.

A qualified clinician, normally within the Family Planning Clinic or within your GPs fits an IUS. An IUS check is recommended 6 weeks following insertion.


Your periods may become erratic initially, this usually settles within 3 to 6 months. Thereafter your periods will normally become shorter and lighter.

This method is considered a treatment for women who have problems with heavy, painful periods.

An IUS can also be used through the menopause.