1984年11月15日,美国食品药物管理局批准铜T380A 型宫内节育器。自1972年起由人口理事会开发的铜T380A 型宫内节育器已通过临床评价。尽管这种带有标记的铜T380A 型节育器在理论上有效性的研究尚需较长的时间,医师还是嘱咐使用者放置4年后需取出或更换宫内节育器。虽然全世界发放铜T380A 型节育器计划正在进行,但在美国铜T380A 型节育器的有效性尚未确定。10多年来的临床试验证明铜T380A 型节育器是最有效的。在铜T380A November 15, 1984, the US Food and Drug Administration approved the copper T380A intrauterine device. The Bronze T380A IUD, developed by the Population Council since 1972, has passed the clinical evaluation. Although the theoretical validity of this labeled copper T380A IUD still takes longer, the physician has asked the user to remove or replace the IUD after 4 years of placement. Although the worldwide plan to distribute copper T380A IUDs is ongoing, the effectiveness of copper T380A IUDs in the United States has not yet been established. More than 10 years of clinical trials have shown that copper T380A IUDs are the most effective. In copper T380A