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1990年美国食品与药物管理局(FOA)通过了左炔诺酮埋植剂用于避孕。它比其他激素类避孕药有以下优点:首先作用时间长,可减少意外妊娠的危险,另外雌激素禁用者可使用本法。本研究的目的是了解美国低收入妇女对本品态度的转变。 1992年4～10月,本品初次投放市场时,在低收入育龄妇女中作了一项无记名调查。1995年10月～1996年3月又做了同样调查。两次调查均历时约6个月。第一次调
In 1990 the United States Food and Drug Administration (FOA) adopted levonorgestrel implants for contraception. It has the following advantages over other hormonal contraceptives: First, the long duration of action can reduce the risk of unwanted pregnancies. In addition, estrogen disablers may use this method. The purpose of this study is to understand the changes in the attitude of low-income women in the United States to this product. From April to October 1992, when the product was first put on the market, a secret investigation was conducted among women of childbearing age with low income. From October 1995 to March 1996, they did the same investigation. Both surveys took about 6 months. The first tune