Birth control: The birth control Ortho Evra should protect you 92% of the time. Remember, the Ortho Evra patch is 92 percent to 99.7 percent effective. This means that with perfect use, less than 1 out of every 100 women who use the patch will become pregnant. With typical use, 8 out of every 100 women who use the patch will become pregnant.
Answered 6/30/2014
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