Morning-after pill



Plan B One-Step

By Mayo Clinic staff
Original Article:  http://www.mayoclinic.com/health/medical/IM04402
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Plan B One-Step

Photo of Plan B One-Step morning-after pill

Plan B One-Step is a type of morning-after pill that can be used after unprotected sex to prevent pregnancy. Plan B One-Step contains the hormone levonorgestrel — a progestin — which can prevent ovulation, block fertilization or keep a fertilized egg from implanting in the uterus.
IM04402

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