Here are other factors besides not using the method perfectly that can reduce birth control effectiveness
Some prescription medications may make birth control less effective.
Forgetting to take a dose or taking it late can mean a greater chance of pregnancy.
Natural, integrative, and herbal remedies can reduce the efficacy of some birth control.
Birth control injections also contains progestin. If you get the birth control shot, you'll require a new shot every 3 months
Contraceptive patches and rings also have to be changed on a regular schedule.
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