A form of hormonal contraception in which a ring, containing progestin and estrogen, is placed at the cervix to prevent ovulation and implantation of a fertilized egg.
A flexible polymer impregnated with contraceptive hormones which a woman places inside her vagina and leaves in place for 21 or more days. When it is removed, withdrawal bleeding occurs. Side effects can include vaginitis or vaginal irritation. Like other forms of contraception, the ring increases a woman’s risk of blood clotting. It should be avoided by smokers. It does not provide protection against sexually transmitted diseases.