How Do Emergency Birth Control Pills Work. emergency contraception (ec) can stop a pregnancy before it starts. The purpose of emergency contraception is to prevent pregnancy after a.
Only certain kinds of birth control pills that contain specific doses of both estrogen and progestin can be used in. Although you may have heard using bc. emergency contraception can work well, but it's not a substitute for regular birth control.
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How much of an effect depends on the type of pill you're taking and what concentration of estrogen or progestin. But you don't have to wait until the morning after sex to take it. emergency contraception can work well, but it's not a substitute for regular birth control. The purpose of emergency contraception is to prevent pregnancy after a.