Plan B, also known as the morning-after pill, is an emergency contraceptive that can help prevent pregnancy after unprotected sex. However, Plan B is not 100% effective.
Plan B works by delaying or preventing ovulation, the release of an egg from the ovary. If ovulation has already occurred, Plan B will not be effective.
The effectiveness of Plan B depends on several factors, including:
- When it is taken: The sooner it is taken after unprotected sex, the more effective it is.
- The individual's weight: Plan B is less effective in people who weigh more than 165 pounds.
- Other medications: Some medications can interfere with the effectiveness of Plan B.
If a woman takes Plan B and still gets pregnant, it is important to consult with a doctor.
It is important to note that Plan B is not a substitute for regular contraception. If you are sexually active, it is important to use a reliable form of birth control to prevent pregnancy.
