宫内节育器(IUD)是国际上妇女广泛使用的控制生育易被接受的一种计划生育方法。但副作用包括严重的出血和疼痛成为此种避孕方法的主要问题,目前使用的无活性的释放铜节育器的妇女、其月经失血量增加、甚至发生缺铁性贫血。在发达国家营养良好的妇女尚能代偿失血;但在发展中国 IUD is a kind of family planning method that is widely accepted by women in the world to control birth. However, side effects, including severe bleeding and pain, have become major issues with such contraceptive methods. The current use of inactive IUDs in women has increased menstrual blood loss and even iron deficiency anemia. Well-nourished women in the developed countries are still able to compensate for the loss of blood; but in developing China