The purpose of emergency contraception (EC) is to prevent unplanned pregnancy when there has been unprotected intercourse. It’s a medical strategy that allows birth control, without being a regular method of family planning. Initially was called “morning-after pill”, which was an inadequate definition because it’s not always a pill, it should not be expected the next morning to use it and can be used several days after intercourse. To identify available tool for EC, a literature review was performed in the PubMed, ScienceDirect, EBSCOhost, OvidSP, Embase (English) and Scielo (Spanish) databases. The application of the intrauterine copper device, within the first five days after intercourse, is the most efficient way to perform EC. Similarly, ulipristal acetate is the best way for hormonal EC. The effectiveness rates of levonorgestrel-only pills and those of ethinyl estradiol combined with levonorgestrel (Yuzpe's method) are important, statistically significant and accepted for EC, remembering that dose…