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As effective as the Pill, ORTHO EVRA is the only weekly form of reversible contraception
that's 99 percent effective when used correctly. Clinical data from 3 extensive
trials with more than 3,300 women with over 22,000 menstrual cycles have demonstrated the efficacy of the birth control patch.
ORTHO EVRA helps prevent pregnancy the same way birth control pills do: by preventing
ovulation. This means that the ovary does not release an egg to be fertilized.
It also thickens the cervical mucus, which makes it more difficult for sperm to
enter the uterus, and it changes the endometrium to reduce the chance of implantation.
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