Plan B is a form of emergency contraception that works to prevent ovulation — meaning that the sooner you take it after having unprotected sex, the better.
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Here's How Emergency Contraception Actually Works
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What Happens When You Take Plan B: How It Works
Plan B: How Many Times Can You Take It?
5.8M women have used 'morning after' pill
Plan B. What is it and how does it work?
Emergency Contraception - HPRC — Huntsville Pregnancy Resource Center
When to Take Plan B
Plan B: How Many Times Can You Take It?