Little chance: A morning-after pill taken within 2 days after sex is very effective in preventing pregnancy. It is about 95% effective, which translates to: if 100 women take the pill the day after sex, about 5 women get pregnant, and 95 will not get pregnant from that sex. The morning-after pill works less well on days 3, 4, or 5 after sex. One should do a urine pregnancy test 3 weeks after sex, to be sure.
Answered 11/9/2016
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