宫内节育器(IUDs)不能继续使用的主要原因是由于其导致出血。一般在月经周期更明显。用这种方法来调节生育的妇女常是产次多和营养不良者。为了确定月经失血增多的程度及其发病率,已采用统一标准,在巴西等地开展了对失血量的研究。试验提示,不含药的节育器失血比对照组高(在不同妇女中从59—110％)。同样,应用含药带 The main reason IUDs can not be used further is because they cause bleeding. Generally more obvious in the menstrual cycle. Women who use this method to regulate their fertility often have multiple births and undernutrition. In order to determine the extent of menstrual blood loss and its incidence, uniform standards have been used to study blood loss in Brazil and other places. Tests suggest that drug-free IUDs have higher blood loss than the control group (59-110% in different women). Again, use medicated tape