Levonorgesterel

Levonorgestrel, also known as the "morning after pill," is an emergency contraceptive that is given after unprotected sex to prevent unintended pregnancy.

Levonorgestrel is a hormonal contraceptive pill for women that works by preventing the release of the egg from the ovary to prevent sperm fertilisation (male reproductive cells). Levonorgestrel should be taken within 72 hours of unprotected sex in order to prevent pregnancy; when taken earlier, levonorgestrel is more effective at doing so.