Fig. 4: Distribution of novel cardiovascular amplitude metric for participants using a birth control pill and naturally cycling participants.

Histogram plots for the distributions of RHRamp values are shown in (a) and the distributions of RMSSDamp values are shown in (b). In both (a) and (b), the naturally cycling cohort is displayed in light gray with the cohort mean represented by the dashed (---) line, while the birth control pill cohort is displayed in dark gray with the cohort mean represented by the dotted (ā¦) line.