The secondary outcome measures are cardiovascular events, quality of life, costs and incremental cost effectiveness ratios.

二次结果的措施心血管事件，生活质量，成本和增量成本效益比率。

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Objective To evaluate acceptance, cost and effectiveness ratios of three kinds of intrauterine device(IUD): Yuangong IUD, GyneFix IUD and MCu IUD applied in rural areas.

目的了解元宫环、吉尼环、爱母环在农村推广的可接受性、效果和成本。

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