What is it?
- A small, flexible piece of soft plastic that fits inside the womb.
- It is easily inserted by a trained health care professional.
- It releases a hormone progesterone into the womb.
How does it work?
- The hormone thickens the mucus at the entrance to the womb preventing sperm getting through and thins the lining of your womb preventing implantation of a fertilised egg. It may also stop ovulation (eggs being released from the ovaries) in some
What’s great about it?
- Extremely effective (>99%). Less than 1 in 500 women will become pregnant using the device.
- Contraception lasts for 3-5 years unless you want it removed earlier.
- Periods usually become lighter, shorter and sometimes less painful.
- Intrauterine system users, by one year, commonly do not experience any bleeding.
- Can be used by women who have never had a baby.
- Fertility returns as soon as it is removed.
- There will be no need to take pills, interrupt sex or requirement to attend clinic regularly after insertion.
- Is not affected by other medications.
What’s not so great about it?
- No protection against sexually transmitted infections (STIs) - condoms advised.
- Insertion can be slightly uncomfortable. Local anaesthetic is offered.
- Can cause unpredictable bleeding pattern for the first three months, but after this time bleeding becomes infrequent and irregular, or stops altogether.
- Can become displaced or fall out (expulsion) but this is uncommon (5 in 100) and you can do checks yourself to make sure it’s in place.
- Small risk of pelvic infection for up to 3 weeks after insertion. This risk is reduced by having a sexual health screen prior to the fitting.
- Very small risk of perforating the womb or cervix (1 in 500 risk).
Where can I get it?
- Sexual Health services. A preliminary appointment is usually required before fitting this method to discuss the method fully, screen for infections and schedule a fitting date.
- Family planning clinics
- Some GP practices