More than 99% effective. An IUS normally works for five years but can be taken out earlier. Fewer than 1 in 100 women will get pregnant over five years when using an IUS.
If you experience pain in your lower abdomen, have a high temperature or expeirence a smelly discharge coming from your vagina, you should talk to your doctor or a health professional Immediately.
You should also ask about risk factors such as smoking, your age or medical history before you get the intrauterine device