Plan B One-Step

Definition

Plan B One-Step is an emergency contraceptive pill containing levonorgestrel. It is used to prevent pregnancy after unprotected sex or contraceptive failure.

5 Must Know Facts For Your Next Test

1. Plan B One-Step should be taken within 72 hours of unprotected intercourse for maximum effectiveness.
2. Levonorgestrel, the active ingredient in Plan B, primarily works by inhibiting ovulation.
3. It is available over-the-counter without a prescription for women of all ages.
4. Plan B One-Step does not terminate an existing pregnancy and is not an abortion pill.
5. Common side effects include nausea, fatigue, and changes in menstrual cycle.

Review Questions

• What is the primary mechanism of action for Plan B One-Step?
• How soon after unprotected sex should Plan B One-Step be taken to ensure maximum effectiveness?
• Is Plan B One-Step available over-the-counter or does it require a prescription?

Related terms

Levonorgestrel:

A synthetic progestin used in various contraceptives including Plan B.

Emergency Contraception: Methods used to prevent pregnancy after unprotected sex or contraceptive failure.

Ovulation Inhibition: The process of preventing the release of an egg from the ovary.