emergency contraceptive methods are marketed legally, but family planning organizations shy away from offering them. In China, postcoital methods have long been offered by the government family planning service. However, these methods have not been separated into those advocated for emergency use only and those recommended for ongoing use. Finally, in Mexico and Nigeria, awareness of emergency contraception continues to be low among both health care providers and the public. Research, both on a way to create knowledge of emergency contraception and on a way to publicize the methods, has been largely concentrated in European countries; many developing countries, and even many developed ones, have yet to conduct any research on this topic. For example, Mexico’s first clinical trial of an emergency contraceptive method (a combination of levonorgestrel and ethinyl estradiol, administered orally or vaginally) is under way, fully 30 years after the original research on the method was conducted. In the case studies that follow, we summarize information on experiences with emergency contraception in each of these countries. We then draw on these experiences to suggest lessons for other countries seeking to introduce or expand the use of this method. United Kingdom History of Emergency Contraception