The recommended options for oral emergency contraception (EC) are ulipristal acetate 30 mg and levonorgestrel 1.5 mg. These oral methods work by inhibiting or delaying ovulation. Ulipristal acetate is more effective than levonorgestrel and remains effective within 120 h of sexual intercourse, whereas levonorgestrel is licensed for use within 72 h only. Mifepristone is also effective for EC, but a registered EC product is only available in a few countries. Although the copper intrauterine device is by far the most effective form of EC, oral methods are more commonly used. The combination of oral EC with cyclooxygenase inhibitors offers potential for more effective oral EC methods.