在子宫内放置节育环,以达到避孕目的已有60余年历史。目前它是我国应用最广的一种节育方法。我国应用推广子宫内节育器也有20余年历史,大多数妇女一直是用不锈钢的金属环。妇科医生要了解子宫内环的形态、位置和有无脱落等,并对避孕环的效能作一个估计,较有效的工具就是进行X线检查。我们在这方面进行了大量的工作,现总结如下。 IUD placed in the womb in order to achieve the purpose of contraception has more than 60 years of history. It is currently the most widely used method of birth control in China. Application of IUD in China has more than 20 years of history, most women have been using stainless steel ring. Gynecologists to understand the shape of the uterus, the location and whether the fall off, and the effectiveness of the ring made an estimate, a more effective tool is to carry out X-ray examination. We have done a great deal of work in this area and are summarized as follows.