The objective of this study is to make the public aware of progress, safety, effectiveness of use, acceptance, and over-the-counter availability of emergency contraception (EC). Data were extracted from the literature for the period 2000-2006 via MEDLINE using a keyword, and also from some pre-2000 journals. Randomised trials, reviews, surveys, clinical investigations, and articles relevant to the subject matter are considered in this review. Approximately 85%, 57% and 84% of unintended pregnancy could be prevented by using levonorgestrel, the Yuzpe regimen (levonorgestrel plus ethinylestradiol), and mifepristone, respectively, as EC. Levonorgestrel was more effective than the Yuzpe regimen in preventing pregnancy. A dose of 1.5 mg levonorgestrel seemed to have similar effectiveness as that of split doses (0.75 mg twice) at 12 h apart, and that of a low-dose (10 mg) of mifepristone. Nausea and vomiting, dizzy spells and fatigue were less frequent in women using levonorgestrel only than in those receiving the Yuzpe regimen. The mode of action of EC is associated primarily with inhibition of ovulation. EC acts before implantation and hence does not amount to abortion. Teenagers are more likely to be repeat users of EC. Easy access to EC over the counter is likely to increase its use but will widen the chance of misuse or abuse. Both adolescents and health care providers need to be adequately educated and informed about EC to make this method successful. Over the counter supply of EC without prescription but with pharmacists' counselling may increase reduction of unintended pregnancy and abortion. The controversy surrounding, and opposition to, EC may subside with more awareness and knowledge among the public about its mode of action, safety and effectiveness. Educational programmes on EC and further studies on the psychosocial aspects of its use may resolve hurdles for implementation of 'advance provision' or 'over the counter supply' of EC in the community.