分娩时发生的严重并发症之一，是指由于胎膜早破、子宫颈裂伤、胎盘早剥、子宫破裂等导致的羊水及其内容物进入母体的血液循环引起肺动脉栓塞的疾病。死亡率很高amniotic fluid embolism

• 孕妇子宫猛烈收缩，宫颈压迫胎盘，最终引起了羊水栓塞。

  The pregnant woman's uterus contracted violently, which lead to the cervix constricting the placenta, and finally caused an amniotic fluid embolism.

• 送来医院的产妇出现了迟发性羊水栓塞，生命垂危。

  The woman was brought to the hospital during childbirth, and was close to death due to suffering from a delayed amniotic fluid embolism.