When it comes to the facts about Plan B One-Step emergency contraception and your body – we’ve got you. Plan B should not be used as regular birth control, but it is there as a backup plan if you need it. Plus, as the #1 OB/GYN recommended emergency contraception brand, Plan B is safe to use and will not impact your future fertility. It must be taken within 72 hours after unprotected sex or birth control failure – the sooner you take it, the better it works. #IveGotThis Use as directed. #emergencycontraception