IUD (Coil)

How it works

A small plastic and copper device is put into the uterus.

It stops sperm reaching an egg, and may also stop a fertilized egg implanting in the uterus.

It works best if in place correctly.

Sometimes menstrual periods may lead to its misplacement. Women are taught to check if the IUD is in place.

  • 99% effective.
  • works as soon as it is put in.
  • Can stay in 10 years depending on type, but can be taken out at anytime.
  • You don’t have to think about contraception for as long as the IUD is in place.
  • When the IUD is removed your fertility will return to normal almost immediately.
  • If fitted after 40 it can stay in place until the menopause.
  • Not affected by other medicines.
  • Do not protect you from STI / HIV
  • May not be suitable for women at risk of getting a sexually transmitted infection as may spread infection to the uterus.
  • Periods may be heavier or longer and more painful.
  • There is a small chance of getting an infection during the first 20 days after insertion.
  • Insertion can be uncomfortable.
  • A check for any existing infection is usually advised before an IUD is put in.
  • Irregular bleeding or spotting is common in the first six months.