Abstract：
True knots in the umbilical cord are rare, affecting approximately 1% of all pregnancies. The diagnosis may be missed antenatally during routine ultrasonography. Many known predisposing factors are associated with true knotting. In the majority of cases, it has no bearing on foetal outcome, but may rarely be linked to intra-uterine foetal death.
摘要：
脐带真正的结是罕见的，影响约1%的怀孕。常规超声检查可能会在产前漏诊。许多已知的诱发因素与真正的打结有关。在大多数情况下,它对胎儿的结局没有影响，但可能很少与子宫内胎儿死亡有关。
