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. 2018 Apr 29;596(23):6105–6119. doi: 10.1113/JP275659

Figure 5. Ontogenic changes in indices of sympathetic contribution to fetal heart rate variability during chronic normoxia and hypoxia.

Figure 5

Values represent the mean ± SEM (n = 12) for absolute and normalised LF in quiet and active sleep. Period of chronic hypoxia (filled circles) or normoxia (open circles) indicated by dashed box. ‘B’ represents an average of values taken in the 72 h period −2 to 0. Significant differences (P < 0.05): *significant effect of oxygenation between treatment groups; †significant effect of gestational age in normoxic pregnancy on each individual day 1–13 when compared to the baseline ‘B’ period; ‡significant effect of gestational age in hypoxic pregnancy on each individual day 1–13 when compared to the baseline ‘B’ period (RM two‐way ANOVA with post hoc Tukey's and Holm–Sidak tests).