Birth Control methods, including Intrauterine Devices (IUDs), are highly effective at preventing pregnancy when used correctly. IUDs, both hormonal and non-hormonal (copper), are among the most effective forms of birth control, with a success rate of over 99%. Hormonal IUDs release progestin, which thickens cervical mucus and may suppress ovulation, while copper IUDs release copper ions that are toxic to sperm, preventing fertilization. Both types of IUDs offer long-term protection, ranging from three to ten years, depending on the type.

The effectiveness of Birth Control pills, patches, rings, and injections also remains high when used consistently and correctly. However, their success rates can be lower due to the potential for human error, such as missing a dose. Birth control pills have a typical use effectiveness rate of around 91%, while other methods like the patch and ring are similarly effective when used as directed. Overall, IUDs provide a more reliable, low-maintenance option for those seeking long-term contraception.