IUD (Intrauterine device)

How effective is it?


Over 99 per cent effective.  Less than one woman in 100 will get pregnant over
 five years.


How does it work?

A small plastic and copper device is put into the uterus. It stops sperm reaching an egg, and may also stop a fertilised egg implanting in the uterus.

What are the advantages?

  • Works as soon as it is put in.

  • Can stay in 5–10 years depending on type, but can be taken out at any time.
  • 
You do not 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.

What are the disadvantages?

  • Periods may be heavier or longer and more painful.
  • 
Very small chance of getting an infection during the first 20 days after insertion.
  • 
Insertion can be uncomfortable.

Anything else I should know?

  • If fitted after 40 it can stay in place until the menopause.

  • Women are taught to check the IUD is in place.

  • A check for any existing infection is usually advised before an IUD is put in.

  • Not affected by other medicines.