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美国食品与药物管理局经过七年的检验,最近批准最新避孕工具—阴道海绵投放市场。这种用柔软且具有韧性的聚氨基甲酸乙酯制成的避孕工具也是制造人工心脏瓣膜和人工动脉的原料。阴道海绵内侧形状恰如子宫颈,其孔与子宫相通;外侧有供取出用的布环。使用时每个阴道海绵的有效时间为24小时。聚氨基甲酸乙酯内含有经美国食品与药物管理局批准使用的一克高效杀精子剂—nonoxynol-9—
After seven years of testing, the U.S. Food and Drug Administration recently approved vaginal sponge on the market. This contraceptive tool, made of soft and flexible polyurethane, is also the raw material for the manufacture of prosthetic heart valves and artificial arteries. Vaginal sponge just inside the shape of the cervix, the hole communicating with the uterus; out there for the cloth ring for removal. When used with each vaginal sponge effective time is 24 hours. Polyurethane contains one gram of highly effective spermicide approved by the U.S. Food and Drug Administration-nonoxynol-9-