出典:Wikipedia
出典:『Wikipedia』 (2011/06/27 16:19 UTC 版)
NuvaRing is the trade name for a combined hormonal contraceptive vaginal ring manufactured by Merck (formerly Schering-Plough, formerly Organon) 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.