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左炔诺孕酮宫内释放系统(LNG-IUS),商品名为曼月乐(Mirena),它是一种含有左炔诺孕酮的宫内节育系统,由德国Bayer Schering公司20世纪70年代研制,经历长达7年之久临床研究后,于2000年末获得美国FDA批准,用于育龄生育妇女的宫内避孕。曼月乐的组成是以T型塑料支架,纵臂内含有52 mg左炔诺孕酮(LNG),每天可稳定释放约
The levonorgestrel intrauterine release system (LNG-IUS), marketed as Mirena, is an intrauterine contraceptive system containing levonorgestrel administered by Bayer Schering AG of Germany in the 1970s Research and development, after up to 7 years of clinical research, was approved by the United States FDA in late 2000 for intrauterine contraception for women of reproductive age. Mirena composition is based on T-plastic stent, trailing arm contains 52 mg of levonorgestrel (LNG), stable release of about every day