Fig. 4

Pathological findings under a microscope revealing several remarkable manifestations and no artery remodeling. A The muscular layer of the oviduct wall was obviously thickened, the decidual plate placenta was absent, and the placenta was adhering directly to the musculature; B Most trophocytes had lost their nuclei, with inadequate blood supply; C Several terminal villi had become elongated, less branched, and sparse and some did not have vessels; D Aggregation of syncytiotrophoblast nuclei was along villi to form syncytial knots