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A, Transient increases in endothelial cell calcium following stimulation with acetylcholine (Ach; concentrations shown on x-axis) in uterine arcuate arteries from the implanted (PH) versus nonimplanted (NPH) horns (n = 7). No significant differences (P < .05) were detectable. B, Similar data showing sustained increases in endothelial cell calcium following ACh stimulation (n = 7); no significant differences (P > .05) were detectable.
