Intrauterine devices (IUDs) are among the most effective contraceptives, and pregnancy with an IUD in place is very rare. If the IUD fails for some reason and you become pregnant, it might cause some complications to the pregnancy. For example, there is a higher risk of ectopic pregnancy than normal if you get pregnant with an IUD. If you get a positive pregnancy test with an IUD in place, you should see a gynaecologist urgently for an ultrasound. If you decide to have an abortion with pills, you should have the IUD removed before taking abortion pills.