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皮下埋植是由6根硅橡胶胶囊组成,内含左旋18甲基炔诺酮(LNG)。大量临床试验已证明,皮下埋植法每天大约释放30μg的药物。临床观察,血液浓度都能维持稳定达五年以上,大约是0.3ng/ml。智利的经验,在18530个妇女月中,应用头5年的标准指数是0.63,并且其中15％的妇女是由于出血问题和其它医学原因而终止使用。在应用皮下埋植法五年以后,第二次再选择应用此种方法避孕的多数妇女未发生妊娠。LNG在体内清
Subcutaneous implants are composed of six silicone rubber capsules containing levonorgestrel 18 (LNG). Numerous clinical trials have demonstrated that subcutaneous implants release approximately 30 μg of drug per day. Clinical observations, the blood concentration can remain stable for more than five years, about 0.3ng / ml. The experience of Chile shows that the standard index for the first five years of application of the 18,530 women is 0.63, and 15% of them are discontinued due to bleeding problems and other medical reasons. After applying the subcutaneous implant method for five years, most women who chose to use this method for contraception for the second time did not have any pregnancy. LNG in the body clear