What is the most effective emergency contraceptive option?

The copper IUD is widely regarded as the most effective emergency contraceptive option available. Its mechanism involves the prevention of fertilization by creating an inflammatory reaction in the uterine lining that is toxic to sperm and eggs, which can also inhibit implantation if fertilization has occurred. When used within five days of unprotected intercourse, the copper IUD has been shown to have an efficacy rate greater than 99%, making it the most reliable form of emergency contraception.

Additionally, the copper IUD provides ongoing contraception for up to 10-12 years, offering a dual benefit for those who may seek long-term birth control solutions. While other forms of emergency contraception, such as combined oral contraceptives, progesterone-only pills, and levonorgestrel pills, can be effective up to a certain degree and within specific time frames, the copper IUD's overall effectiveness and versatility truly set it apart as the preferred option in emergency situations.