A 47-year-old member asked:
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does plan b work?

2 doctor answers
Dr. Dennis Higginbotham
29 years experience Obstetrics and Gynecology
Yes: Plan b is about 90% effective if taken within 3 days (72 hours) of having unprotected sex. It may still work up to 5 days (120 hours) after unprotected sex, but the failure rate is higher.
Answered on Feb 29, 2020
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Dr. Karen Pendleton
36 years experience Preventive Medicine
Plan B can work: Plan B pills contain a high dose of the active ingredient Levonorgestrel, which is a second generation progestin. Progestins, just like natural Progesterone cause the uterine endometrium to slough thus causing a period. It works mainly by stopping the release of an egg from the ovary. It is possible that it may also work by preventing fertilization of an egg and its attachment to the uterus.
Answered on Nov 28, 2017

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Related questions:

A 46-year-old member asked:
Dr. Heidi Fowler
24 years experience Psychiatry
Plan B one step: Plan b one-step can reduce your risk of pregnancy by up to 95% is used within 24 hours of sex.
A 25-year-old female asked:
Dr. Jane Van Dis
17 years experience Obstetrics and Gynecology
Yes, but diminishing: Studies have shown that women can still benefit from using Plan B as late as 4 days after unprotected sex. It's better than not using is you're worri ... Read More
A 43-year-old member asked:
Dr. Heidi Fowler
24 years experience Psychiatry
Yes: Plan b can be used after ovulation. It can be used at any time during your menstrual cycle.
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A 27-year-old member asked:
Dr. Bac Nguyen
22 years experience Family Medicine
Preventing ovulation: The medication works by inhibitting ovulation. Thus, no egg, no pregnancy! the half-life of the medication varies greatly ranging from 11 to 45 hours ... Read More
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