Plan B contains evonorgestrel, the same ingredient used in many birth control pills—and it works in a similar way.
Depending upon where you are in your cycle, Plan B may work in one of these ways-- it may prevent or delay ovulation or it may interfere with fertilization of an egg. It is also possible that it prevents implantation of a fertilized egg in the uterus by altering its lining.
It is possible that in your case, Plan B worked by the third mentioned mechanism and that may explain the heavier menstrual flow.
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Hello Anonymous,
Plan B contains evonorgestrel, the same ingredient used in many birth control pills—and it works in a similar way.
Depending upon where you are in your cycle, Plan B may work in one of these ways-- it may prevent or delay ovulation or it may interfere with fertilization of an egg. It is also possible that it prevents implantation of a fertilized egg in the uterus by altering its lining.
It is possible that in your case, Plan B worked by the third mentioned mechanism and that may explain the heavier menstrual flow.
Maryann
February 4, 2013 - 6:11pmThis Comment
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