pathological changes in the placenta consist of degeneration of the trophoblast , thrombosis and fibrin deposition in maternal vascular spaces , congestion of maternal blood spaces , hemorrhage into the uterine cavity , placental separation , intrauterin fetal death , decidual or uterine vein thrombosis , placentitis ( 10 % of the cases ) , and fetal resorption .
C0032043
placenta
C0000832
placental separation