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A member asked:
How effective is emergency contraception (plan b) after the first 72 hours?
3 doctors weighed in across 2 answers
About same: According to a study published in 2010, there were 2.6% pregnancy when taken within first 3 days and 1.5% when taken between 3-5 days. This does not mean it works better when taken later but certainly suggests taking 3-5 days after is still worthwhile. Paper here: http://www.Thelancet.Com/journals/lancet/article/piis0140-6736(10)60101-8/abstract.
Answered 4/16/2015
4.2k views
Plan B: Plan B One-Step is up to 89 % effective when taken within 72 hours (3 days) after unprotected sex. It can reduce chance of pregnancy by up to 95% if used within 24 hours. It continues to reduce the risk of pregnancy up to 120 hours (5 days) after unprotected sex, but is less effective as time passes.
Answered 11/28/2017
535 views
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