放节育环是避孕的有效方法之一。但如果放得不恰当,环的形态、位置可发生变化,从而失去避孕效能。为了弄清宫内节育环形态、位置与避孕的关系,近年来我们随访了526例宫内带环者(其中26例为带环妊娠者),现将其X线检查结果报告如下: 一、节育环形态与避孕的关系 Putting birth control ring is an effective method of contraception. However, if placed inappropriately, the shape of the ring, the position may change, thus losing the effectiveness of contraception. In order to understand the shape and location of intrauterine contraceptive ring and the relationship between contraception, in recent years we followed 526 cases of intrauterine banding (of which 26 cases were pregnant women with ring), now the X-ray findings are as follows: First, birth control Relationship between ring morphology and contraception