USAD in rats PE model in PC, PE, PE+aspirin, PE+KCW 2 ml/200 g BW, and PE+KCW 3 ml/200 g BW was measured using HE staining. USAD was measured from 5 fields from outer to outer using a microscope with NA 0.65 and a magnification of 400×. Measurements were performed using Touplite and manual applications converted to micrometer units. In L-NAME-induced PE rats, the nutritional treatment effect of KCW increased the vasodilation of the spiral artery. On GD 20, USAD was measured in several groups. Data are presented as means ± SD. ANOVA and post hoc Tukey test were significant *p < 0.05 compared to the PC group; # p < 0.05 compared to the PE group.