fetal thrombotic vasculopathy fetal thrombotic vasculopathy fetal thrombotic vasculopathy is a chronic disorder characterized by thrombosis in the fetus leading to vascular obliteration and hypoperfusion. fetal thrombotic vasculopathyintermediate magnification micrograph of the placental disc showing a thrombosed fetal vein, as may be seen in fetal thrombotic vasculopathy. h&e stain.specialtypathology it is associated with cerebral palsy and stillbirth. it is more common in women who have diabetes mellitus. diagnosis it can be diagnosed by histomorphologic examination of the placenta and is characterized by fetal vessel thrombosis and clustered fibrotic chorionic villi without blood vessels. low mag. high mag. very high mag.