The etiology of amniotic fluid embolism may be related to high intra-amniotic pressure, opening of blood sinuses, rupture of fetal membranes, etc. It cannot be said to be caused by cesarean section. 1. Excessive pressure in the amniotic cavity: the pressure in the amniotic cavity during uterine contraction in the process of labor can reach 100~175mmHg, when it obviously exceeds the hydrostatic pressure, amniotic fluid will be squeezed into the ruptured microvessels and thus enter into the blood circulation of the mother. 2. Opening of blood sinus: In the process of labor, the uterine body and cervix may be damaged, and the blood sinus may be ruptured, which may cause amniotic fluid to enter the maternal circulation from the broken blood vessels or the blood sinus behind the placenta. 3. Rupture of fetal membranes: after the rupture of fetal membranes, amniotic fluid enters the maternal circulation from the cervical canal or small blood vessels ruptured by the uterine meconium. High-age primiparous labor, excessive amniotic fluid, cesarean section, etc. may be the triggering factors of amniotic fluid embolism, but the etiology is still unknown. It is important to choose a hospital that specializes in births, where doctors can make quick decisions in emergencies and be able to take appropriate measures to improve the quality of life.