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A member asked:
How does the medicine in the birth control patch work to prevent pregnancy?
3 doctors weighed in across 2 answers
4 ways: The most commonly used pills have estrogen and progestin. They thicken the cervical mucus so sperm can't swim. They slow the fallopian tubes from pushing the egg forward. They thin the lining so an egg can't implant. They stop the ovary from making an egg.
Answered 7/20/2012
6.4k views
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Stops egg release: Birth control pills, patches and rings generally work by preventing your ovaries from releasing an egg-- preventing ovulation.
Answered 3/26/2013
5.3k views
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