There is no medical evidence that Plan B One-Step would harm a developing baby. If you take Plan B One-Step accidentally after you're already pregnant, or it doesn't work and you become pregnant, it's not likely to cause any harm to you or your pregnancy. Plan B One-Step will not disrupt or affect an existing pregnancy.
Plan B should not be used in a known pregnancy.
- Plan B Information for Consumers
- Plan B Information for Healthcare Professionals (includes dosage details)
- Side Effects of Plan B (detailed)
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