What is Plan B?

What is Plan B?
Plan B is a new emergency contraceptive (morning after pill) that was approved by the FDA in July 1999. It is made up of two progestin-only pills containing levonorgestrel.

Progestins are the “pregnancy” hormone. Levonorgestrel is used in regular birth control methods, such as Norplant. Previous formulations had used progestins in combination with estrogens, the “female” hormone. It is the first progestin-only pill that has been approved in the U.S. for emergency contraception after either unprotected sex or a contraceptive accident, such as a condom breaking.


How does plan B work? plan B is two pills which you take together. If taken within 72 hours, it prevents pregnancy by doing one of three things:

Temporarily stops the release of an egg from the ovary
Prevents fertilization
Prevents a fertilized egg from attaching to the uterus

plan B is a day after pill, not an abortion pill—if you take plan B you will not be terminating a pregnancy.

If you are already pregnant and take plan B, there’s no evidence that plan B will harm you or the fetus.

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