Contraceptive coils

Intrauterine system

What is it? A small T-shaped, progestogen-releasing, plastic device put into the uterus (womb).

How effective is it? Over 99%

Advantage: Works for 5 years but can be taken out sooner. Periods can often become lighter, shorter and less painful.

Disadvantage: Sometimes there can be irregular bleeding or spotting for the first 6 months of having an IUS.


Interauterine Device

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

How effective is it? Over 99%

Advantage: Can stay in the body for 5-10 years depending on the type but can also be taken out sooner.

Disadvantage: Periods can sometimes be heavier, longer and in some cases, may be more painful.