Answers are Levonorgestrel and Uliprestel .
Emergency contraception is a method to avoid pregnancy after having unprotected sex. Emergency contraception pills are hormone pills that women can take after having sex. There are different types of emergency contraception pills. On such pill is the levonorgestrel which works best up to 72 hours after having unprotected intercourse. The other emergency contraception pill is ulipristal acetate which can be taken up to 5 days after unprotected intercourse. Levonorgestrel is FDA approved and is sold over-the-counter without a prescription or age. Whereas ulipristal requires a prescription to buy.