我们结合近年文献资料,针对要求置器者的个体差异及宫内避孕器的特性,对常用不同种类宫内避孕器,进行选择使用,取得了一定效果。现将我们对常用宫内避孕器特性的了解及选择方法叙述如下。一、常用宫内避孕器的特性 1.不锈钢金属单环此环不仅具有设计简单、易于放置和取出、便于复查、价格低廉、不易变质、可长期放置等优点,还能在月经周期中随着子宫的变化,沿自身环形轨道移动而不致出现锐角或断裂损伤宫 We combine the literature in recent years, according to the individual differences between those who request the device and the characteristics of intrauterine devices, the commonly used different types of intrauterine devices, to choose to use, and achieved some results. Now we understand the characteristics of commonly used intrauterine devices and methods of selection are described below. First, the characteristics of the commonly used IUD 1. Stainless steel single ring This ring not only has the design simple, easy to place and remove, easy to review, low price, not easy to deterioration, long-term placement, etc., but also in the menstrual cycle with the Changes in the uterus, along its own circular orbit without acute or rupture damage the palace