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植入式避孕棒 让你忘了它

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美国食品药物管理局(FDA)18日核准植入式长效避孕棒Implanon上市。这种火柴棒大小的塑胶避孕棒只含黄体素,体质不适合雌性激素的妇女也可用。Implanon避孕效果号称媲美子宫内避孕器,且植入、取出都简单,植入一次可用3年。

Implanon植入上臂内侧,之后就可以忘了它,不像口服避孕药必须天天定时服用,一旦忘了吃就前功尽弃。美国教堂山北卡罗来纳大学妇产科教授葛林姆斯指出,Implanon的效果在各种避孕方式中名列前茅,“可与男性绝育手术相提并论”。

FDA的临床试验结果显示,942名受测妇女取出Implanon都没有困难,取出后也能很快恢复生育能力,有人取出后30天就如愿怀孕。Implanon问世8年来,已上市的国家罕有Implanon植入后找不到的案例。FDA指出,Implanon就算植入后不见踪影,只要以超音波或磁振造影(MRI)扫描就可发现下落。

Implanon对不急着生小孩或不适用雌性激素的妇女是一大福音,但有植入后经期可能不规则,甚至停经的副作用。再者,它尚未以肥胖妇女进行临床试验,无法预料能否帮助新陈代谢异于常人的肥胖妇女有效避孕。

Implanon制造商OrganonUSA公司发言人表示,这种避孕棒的售价应该不会超过1000美元(约台币3万3000元),一般口服避孕药3年份约需1800美元。


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