Hormonal IUS

​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. It is more than 99% effective as a contraceptive.

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 it sometimes also stops ovulation. This is a long acting and reversible contraceptive method. There are three brands used in the UK


Most can use it, including those who have never been pregnant and those who are HIV positive. It may not be suitable if you have had breast or cervical cancer. Your GP or clinician will be able to advice you if the IUS is the most suitable form of contraception according to your medical history.


  • The IUS is more than 99% effective as a contraceptive.
  • It works for three to five years (depending on the brand), so you don’t have to think about contraception every day or each time you have sex.
  • It’s not affected by other medicines and can be used safely if you’re breastfeeding.
  • It may be useful if you have heavy or painful periods by making it lighter, shorter and less painful.
  • Your fertility will return to normal when the IUS is removed.

  • You might headaches, acne and breast tenderness after having the IUS fitted.
  • It can also cause irregular bleeding, spotting and irregularities on their periods.
  • The IUS doesn’t protect against STIs so you may also have to use condoms when having sex.
  • Some risks that may occur when the IUS is fitted that rarely occur during the first six months can be damage to the womb, pelvic infections or rejection.