A vaginal ring is a small, flexible ring that is placed inside the vagina. It releases hormones that prevent pregnancy by stopping ovulation, which is the release of an egg from the ovary, and by thickening cervical mucus to block sperm. The ring is worn for three weeks, followed by a week without it, during which a menstrual period occurs. It is a convenient and effective form of birth control that requires regular replacement to maintain its effectiveness.

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