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.

 

http://upload.wikimedia.org/wikipedia/en/4/4d/Nuvaringwithruler.jpg

 

 

 

http://upload.wikimedia.org/wikipedia/en/1/1a/Nuvaring_with_quarter.gif

http://upload.wikimedia.org/wikipedia/commons/e/e0/NuvaRing_in_hand.jpg

 

 

 

http://upload.wikimedia.org/wikipedia/commons/b/bd/NuvaRing_compressed.jpg

 

http://www.soc.ucsb.edu/sexinfo/images/ring.jpg

 

References:

1) NuvaRing Web Site – http://www.nuvaring.com

2) WikiPedia NuvaRing – http://en.wikipedia.org/wiki/NuvaRing

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