The copper non-hormonal intrauterine device (IUD) is approved by the FDA for use up to ten years. It works mainly by using copper, which acts like a substance that kills sperm, making it harder for sperm to move through the uterus and preventing fertilization. It’s also very effective at preventing pregnancy, with less than one percent of users getting pregnant. Just like the levonorgestrel IUD, you can quickly become fertile again after the IUD is removed.