What is it?An intrauterine system is a small, T-shaped plastic device that contains progestogen. It’s inserted into your womb by a specially trained health professional.
The IUS is a long-acting reversible contraceptive (LARC) method. Once it's in place, it works for five years, so you don't have to think about contraception every day or each time you have sex.
The brand name of the IUS used in the UK is Mirena.
You can use an IUS whether or not you've had children.
How does it work?
The IUS releases a progestogen hormone into the womb, which:
|thins the womb lining so that it's less likely to accept a fertilised egg,|
|thickens the mucus from your cervix, so it's difficult for sperm to move through and reach an egg, and|
|stops ovulation in some women.|
How effective is it?
It's more than 99% effective. This means that fewer than one in every 100 women who use the IUS will get pregnant in a year.
What else should I know?
By using condoms as well as the IUS, you'll help to protect yourself against sexually transmitted infections (STIs).
IUS is freely available from Contraception Clinics. Use the Service Finder to find a clinic that’s most convenient for you. Or call our Central Booking line 01772 401140 for more information on this method or to book an appointment.