Figure 1. (a) The sympathetic measure of vasoconstriction to cold was impaired in HG vs. pregnant controls but the results were not statistically significant. (b) Postural adjustment ratio, a sympathetic adrenergic measure, was significantly lower in HG vs. pregnant controls. (c) R to R, the vagal cholinergic measure, was significantly less in HG vs. pregnant controls. (d) Skin temperature, a mixed measure, was lower in HG, but of borderline significance. (e) Sympathetic adrenergic function index, the sum of VC + PAR, was significantly impaired in the HG vs. pregnant controls. (f) Total autonomic score, a global measure, was significantly impaired in HG vs. pregnant controls.