Emergency contraception, also known as the "morning-after pill," is a type of birth control that can be used to prevent pregnancy after unprotected sex or contraceptive failure. Emergency contraception is most effective when taken as soon as possible after unprotected sex, ideally within 72 hours, although some forms may still be effective up to 5 days after intercourse. It is important to note that emergency contraception is not intended to be used as a regular form of birth control and should be reserved for emergency situations.

There are different types of emergency contraception available, including dedicated emergency contraceptive pills (such as Plan B or Ella), copper intrauterine devices (IUDs), and off-label use of certain regular birth control pills. Emergency contraception works by preventing or delaying ovulation, fertilization, or implantation of a fertilized egg in the uterus.

It is recommended to consult with a healthcare provider or pharmacist to determine the most appropriate form of emergency contraception based on individual circumstances. Emergency contraception is a safe and effective option for preventing unintended pregnancies, but it is not 100% effective and should not be relied upon as a primary method of birth control. Regular use of a reliable contraceptive method is recommended for ongoing pregnancy prevention.