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Evra patches are very similar to that of combined oral contraceptives, but in this treatment, your hormones are continuously released into the bloodstream through the skin. Each evra patch contains a 6 mg dose of norelgestromin and a 600 mcg dose of ethinyl estradiol to prevent ovulation. The main mechanism of action is the inhibition of ovulation, but the effects on cervical mucus and endometrium can also contribute to the effectiveness of the product. It should be noted that although evra patches prevent pregnancy since they are almost 100% effective. However, this method of contraception does not protect against sexually transmitted diseases, such as hiv. The effectiveness of birth control patches is not reduced in the event of gastrointestinal problems or vomiting.

Evra patches are very similar to that of combined oral contraceptives, but in this treatment, your hormones are continuously released into the bloodstream through the skin. Each evra patch contains a 6 mg dose of norelgestromin and a 600 mcg dose of ethinyl estradiol to prevent ovulation. The main mechanism of action is the inhibition of ovulation, but the effects on cervical mucus and endometrium can also contribute to the effectiveness of the product. It should be noted that although evra patches prevent pregnancy since they are almost 100% effective. However, this method of contraception does not protect against sexually transmitted diseases, such as hiv. The effectiveness of birth control patches is not reduced in the event of gastrointestinal problems or vomiting.