Fig. 1From: Fetal heart rate monitoring of short term variation (STV): a methodological observational studyInternal vs. External monitoring of STV during labor. Bland-Altman plot of STV values (n = 463) calculated from signals derived with a scalp electrode and delta-STV (internal – external monitoring), using the twin function of EDAN™. Spearman Rank Correlation R = 0.70; p < 0.01Back to article page