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Comparison of severity estimates: There was no visible change in severity appearance of the 10 AIP ultrasound signs (a,c–j) except for a decrease in severity of the placental bulge (b) and an increase for the comparator sign, i.e., placental degenerations (k) (y-axis: mean severity of appearance ± std. dev. per visit). Significantly more degenerations could be noted at the later US scan (l, percent of positively scored).
