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IUD/Coil

What am I?

Sometimes called the copper coil, the intrauterine device (IUD) is a small, T-shaped plastic and copper device that prevents pregnancy for 
5-10 years.1 The copper is released into the womb, altering the cervix mucus to make it difficult for the sperm to reach the egg and survive 
and it also stops implantation of a fertilised egg1

Effectiveness2

Perfect useTypical use
N/A99%
  • Allows you to enjoy sex spontaneously without worrying about getting pregnant
  • Requires minimal administration – once fitted by your healthcare professional, it doesn’t need to be replaced for a number of years1
illustration of a woman making a heart with their hands and smiling
illustration of a woman making a heart with their hands and smiling
  • The IUD needs to be administered by a healthcare professional1
  • There is a slight risk of infection when the IUD is fitted1
  • Having an IUD fitted can be uncomfortable or painful1
  • There is a slight risk the IUD may move or be pushed out by your body, so you need to check yourself if it’s in place1
  • The IUD may make your periods heavier, longer or more painful, particularly in the first 3-6 months after it is fitted.3 You might also get bleeding between periods3
  • The IUD doesn’t protect against sexually transmitted diseases (STDs) – condoms should be used as well1

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References

  1. NHS Inform. Copper coil (IUD). Available at: https://www.nhsinform.scot/healthy-living/contraception/copper-coil-iud/ Last accessed May 2025

  2. NHS. How well contraception works at preventing pregnancy. Available at: https://www.nhs.uk/contraception/choosing-contraception/how-well-it-works-at-preventing-pregnancy/ Last accessed May 2025

  3. NHS. Side effects of an IUD (intrauterine device) or copper coil. Available at: https://www.nhs.uk/contraception/methods-of-contraception/iud-coil/side-effects/ Last accessed May 2025

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