Figure 7

Spiral arteries observed in sequential sections of myometrium obtained in days 40 and 60 of pregnancy, expressed MMP-2, MMP-9 and K1 in trophoblasts surrounding the vessel, characterized by cytokeratin (CK), and in the swollen endothelial cells, characterized by von Willebrand Factor (vWF). The remaining vascular smooth muscle in day 40 was positive for muscle actin (MA), and has been replaced in day 60. Bar = 50 μm