What is it?

The Hormonal IUS (Intrauterine System) Is a small T-shaped device made of flexible plastic. The IUS releases progestogen hormone into the womb thickening cervical mucus and preventing fertilisation of the egg and sometimes it stops ovulation. This is a long –acting and reversible contraceptive method. 

To compare contraception methods and what will work best for you, use the Contraception Choices Tool.

Most people with a womb can use an IUS. 

However, the IUS may not be suitable if you have:

  • breast cancer, or have had it in the past 5 years

  • cervical cancer or womb (uterus) cancer

  • liver disease

  • unexplained bleeding between periods or after sex

  • arterial disease or a history of serious heart disease or stroke

  • an untreated sexually transmitted infection (STI) or pelvic infection

  • problems with your womb or cervix

  • Long-acting form of birth control and works for 5 years 

  • It is extremely effective. 99% effective at preventing pregnancy

  • It can safely be used if you are breastfeeding 

  • Your fertility will return to normal once it is removed

  • It may make periods less heavy or painful. It can also make periods lighter and shorter and may stop altogether

  • Your periods may or stop completely.

  • In the first 3-6 months bleeding can be irregular

  • You may experience side-effects such as headaches, acne and breast tenderness after having the IUS fitted, but these tend to be temporary.

  • Does not protect against STI’s

  • If you get an infection when you have an IUS fitted, it could lead to a pelvic infection if it's not treated.

The IUS must be inserted by a clinician. Before you can be booked for an IUS fitting, you must be cleared for STI’s and discuss whether it is a safe option for you with a clinician/nurse.