Levonorgestrel is a female hormone that prevents ovulation (the release of an egg from an ovary). This medication also causes changes in your cervical mucus and uterine lining, making it harder for sperm to reach the uterus and harder for a fertilized egg to attach to the uterus. Levonorgestrel emergency contraceptive is used to prevent pregnancy after unprotected sex or failure of other forms of birth control (such as condom breakage, or missing 2 or more birth control pills). Levonorgestrel emergency contraceptive may also be used for other purposes not listed in this medication guide.
Next Choice is a female oral contraceptive which you can take as an emergency preventive for unwanted pregnancy after having unprotected sexual intercourse, or if other forms of birth control you use have failed, such as, a condom broke, or you missed two or more doses of your birth control pills. Next Choice prevents the release of an egg from an ovary. Next choice also alters your cervical mucus and the uterine lining so that a sperm cannot enter the uterus, or a fertilised egg cannot attach itself to the uterus.