Learn why you can get pregnant if you have unprotected sex after taking plan b Discover effective birth control methods for pregnancy prevention. It contains levonorgestrel, a synthetic hormone that primarily works by delaying ovulation—the release of an egg from the ovary Without an egg available for. Plan b one‑step is an fda‑approved emergency contraception pill that you take within 72‑hours after unprotected sex The sooner you take it, the better it works
It is sometimes referred to as the “morning after pill.” it is not an abortion pill and will not harm an existing pregnancy.
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