联体双胎为罕见的畸形,不易与双胎区别,即使X线摄影也常误诊。联体双胎会引起梗阻性难产,给母亲造成危险。在我院1963年—1980年五万例分娩中有两例双胎联体多发畸形。现将其中一例报告如下: 白××,27岁,1980年10月24日23点5分入院,病例号779922。病史:1胎0产,末次月经1980年3月27日,予产期1980年1月4日,早孕反应不明显, Siamese twins are rare deformities, not easy to distinguish between twins, even if X-ray photography is often misdiagnosed. Associated twins will cause obstructive dystocia, causing danger to the mother. In our hospital from 1963 to 1980, there were two cases of multiple twin deformities in 50,000 births. One of the cases is now reported as follows: White × ×, 27 years old, October 24, 1980 at 23:55 admission, case number 779922. History: 1 fetus 0 production, the last menstrual March 27, 1980, the prenatal period January 4, 1980, early pregnancy reaction was not obvious,