Fig. 1

a, b Fetal inflammatory response to acute hypoxic acidemia. *p < 0.05 versus baseline. pH nadir, at pH <7.00; recovery 1 and 24 h after the pH nadir. Median ± {5–95 %}. c IL-1β measured at baseline, pH nadir, and 1 h or recovery correlates to RMSSD (R = 0.57, p = 0.02, n = 17). Baseline values were chosen for lactate >1.5 mmol/l. d White matter microglia cell counts at 24 h recovery correlate to RMSSD at 1 h of recovery (R = 0.89, p = 0.03, n = 6)