A normal delivery is prone to amniotic fluid embolism, which is an extremely serious complication of labor. Amniotic fluid embolism is a process of pulmonary hypertension, hypoxemia, circulatory failure, disseminated intravascular coagulation, and multi-organ failure caused by the entry of amniotic fluid into the mother’s blood circulation, and is an extremely serious complication of labor. Women are at risk for amniotic fluid embolism during labor. When the uterus contracts during labor, the pressure in the amniotic cavity increases significantly, and if it exceeds the venous pressure, amniotic fluid may be squeezed into the broken microvessels into the maternal circulation, and amniotic fluid embolism occurs. If the cervix or uterine body is damaged and the blood sinus is ruptured due to various reasons during labor, amniotic fluid may enter the maternal circulation through the broken blood vessels or the blood sinus behind the placenta, resulting in the occurrence of amniotic fluid embolism. In addition, there may be other causes of amniotic fluid embolism during labor, which should be evaluated by a physician.