РEtiologyР3. uterine volume suddenly narrow ? uterine cavity pressure drop? fetal presentation descent quickly? polyhydramnios (羊水过多) rupture of membrane?? twins,the first one labor rapidlyР2017/12/22Р6РEtiologyР4. Venous pressure of uterine suddenly heighten? supine hypotensive syndrome(仰卧位低血压综合症) Venous pressure of uterine suddenly heighten decidua vein’s bed congestion or rupture placental abruptionР2017/12/22Р7РEtiologyР5. The others :? Cocaine abuse ,smoking ,etc.Р2017/12/22Р8РBasal pathophysiology :basal decidua bleeding ?hematoma of posteroplacenta(胎盘后血肿) adhesion place abruptionР1. Uteroplacental apoplexy? Bleeding into the myometrium of the uterus giving a discolored appearance to the uterine surface.? (called Couvelair uterus, too库弗莱尔子宫)РPathophysiologyР2017/12/22Р9Р2017/12/22Р10
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