Mar 13 2010

NuvaRing – The One Month Ring of Protection

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NuvaRing is is the trade name for a combined hormonal contraceptive vaginal ring manufactured by Merck that is available by prescription. It is a flexible plastic (ethylene-vinyl acetate copolymer) ring that releases a low dose of a progestin and an estrogen over 3 weeks.

NuvaRing is a flexible nonbiodegradable, flexible, transparent, colorless to almost colorless, combination contraceptive vaginal ring containing two active components, a progestin, etonogestrel (13-ethyl-17-hydroxy-11-methylene-18,19-dinor-17a-pregn-4-en-20-yn-3-one) and an estrogen, ethinyl estradiol (19-nor-17a-pregna-1,3,5(10)-trien-20-yne-3,17-diol). When placed in the vagina, each ring releases on average 0.120 mg/day of etonogestrel and 0.015 mg/day of ethinyl estradiol over a three-week period of use. NuvaRing┬« is made of ethylene vinylacetate copolymers (28% and 9% vinylacetate) and magnesium  stearate and contains 11.7 mg etonogestrel and 2.7 mg ethinyl estradiol. NuvaRing┬« is latex-free. NuvaRing┬« has an outer diameter of 54 mm and a cross-sectional diameter of 4 mm. The molecular weights for etonogestrel and ethinyl estradiol are 324.46 and 296.40, respectively.

NuvaRing is available in 32 countries and are used by about 1.5 million women world wide.



1) NuvaRing Web Site –

2) WikiPedia NuvaRing –

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