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How does the contraceptive coil work?

Dr Louisa Draper

"The coil can also be used as an emergency contraceptive. In order to prevent pregnancy after unprotected sex, it needs to be inserted within five days of the episode of unprotected sex. "

Dr Louisa Draper

View Contraceptive Pills
Contraceptive coil
IUD stands for intrauterine device. An IUD is a small coil which is inserted into the uterus to prevent pregnancy. There are two different types of coil, the copper coil and the hormone coil. Both provide highly effective contraceptive cover and are very convenient. Find out how they work and whether a coil is the right contraceptive for you.

Advantages and disadvantages of the coil


  • With the coil you don’t need to remember to take tablets. 

  • You can continue using the coil for several years.

  • The coil is not affected by any medication and remains effective when you are ill or taking antibiotics.

  • Once you remove it you are fertile again.


  • You still need to use a condom for protection against STIs.

  • You may experience heavier or more painful periods (does not apply to the Mirena coil).