Placental abruption, also known as placental abruption, may be caused by the following factors: 1, pregnant women who suffer from diseases such as hypertension or chronic nephritis will lead to capillary necrosis and poor blood flow, causing placental hematoma, resulting in placental abruption in pregnant women, and in general the greater the amount of bleeding, the larger the area of placental abruption; 2, placental abruption may be caused by trauma such as impact on the abdomen, which will result in The rupture of the bottom metaplastic vessels, bleeding, etc., so pregnant women should protect their abdomen during pregnancy; 3, if a pregnant woman has a rupture of the fetal membrane, too much amniotic fluid, causing the uterine wall pressure to drop, resulting in the detachment of the uterine wall and the placenta, will cause bleeding and placental abruption, mostly caused by intercourse in late pregnancy or pregnant women with vaginitis; 4, pregnant women in late pregnancy if the posture is improper pressure on the veins, it is also easy to lead to placental abruption.