If you currently have an IUD or are considering getting one, you likely have questions about how well they work and how you will live with one on a continuing basis. You are not alone. Here are some frequently asked questions about IUDs we hear and answer about this popular birth control method. Do IUDs Actually Prevent Pregnancy? Research shows that hormonal IUDs do prevent pregnancy by impacting sperm function and motility. and by disallowing fertilization of an egg by sperm. Copper IUDs, ... [Read More]