Mechanism of Action
Like all combined hormonal contraceptives, NuvaRing works primarily by preventing ovulation. A secondary mechanism of action is inhibition of sperm penetration by changes in the cervical mucus. Hormonal contraceptives also have effects on the endometrium that theoretically could affect implantation, however no scientific evidence indicates that prevention of implantation actually results from their use. NuvaRing should not be used if a woman is pregnant. There is however no known harm to the woman, the course of her pregnancy, or the fetus if NuvaRing is accidentally used during pregnancy.
NuvaRing delivers 120 µg of etonogestrel (a progestin) and 15 µg of ethinyl estradiol (an estrogen) each day of use.
Read more about this topic: Nuva Ring
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