Figure 6
From: Is there evidence of fetal-maternal heart rate synchronization?
Time series, synchrograms and synchronization epochs. Real and surrogate data sets of a fetus in the 26th week of gestation. Top left panel: RR intervals of mother A and her fetus A, top right panel: RR intervals of another mother B and fetus A (respective mean RR interval ± SD indicated in parenthesis). Bottom panels: corresponding synchrograms for m = 3 demonstrating several epochs of a 5:3 ratio; the black points indicate quantitatively detected synchronization epochs (SE, see text).