Developments and challenges in emergency contraception

Emergency contraception (EC) methods, available in oral and intra-uterine forms, seek to prevent pregnancy after unprotected intercourse or contraceptive failure. Levonorgestrel EC is more effective and has fewer side effects than the previously used combined oral hormonal method; the Yuzpe regimen. In recent years, levonorgestrel has increased in use, and has become available over the counter in pharmacies in many countries. Compared with oral methods, the copper intra-uterine device offers greater protection against unplanned pregnancy but requires a clinical consultation. The much hoped for potential of EC methods to reduce unintended pregnancy is yet to be demonstrated at population level.