当对双胎中的畸形胎儿考虑选择性杀胎时,鉴定绒毛膜是极其重要的。双绒毛膜双胎,其两胎盘间没有血管吻合,选择性杀胎是相对安全的。而单绒毛膜双胎,双胎间有血管交通,对其中之一杀胎,会严重影响另一个胎儿血液动力学状态,导致心衰甚至死亡。而且,血栓栓塞现象也可在存活胎儿中引起多器官的梗塞。 Identification of chorionic villus is of the utmost importance when selective decontamination is considered for the deformed fetus in the twins. Twin chorionic twins, there is no vascular anastomosis between the two placentas, selective killing of the child is relatively safe. The single chorionic twins, twins have vascular traffic between, one of the abortion, will seriously affect the other fetal hemodynamic status, leading to heart failure or even death. Moreover, thromboembolic events can also cause multiple organ infarctions in surviving fetuses.