Information about how levonorgestrel works in your body
Plan B One-Step, My Way, Next Choice One Dose and Opcicon® One-Step contain Levonorgestrel a hormone that has been used in many birth control pills for over 35 years. It contains a higher dose to prevent pregnancy. It works by stopping the release of an egg from the ovary. Levonorgestrel may also prevent fertilization of an egg or by preventing attachment to the uterus.
