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. 2022 Aug 12;101(11):1269–1275. doi: 10.1111/aogs.14434

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© 2022 The Authors. Acta Obstetricia et Gynecologica Scandinavica published by John Wiley & Sons Ltd on behalf of Nordic Federation of Societies of Obstetrics and Gynecology (NFOG).

This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.

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Cardiotocographic signals simultaneously acquired from the same fetus by transabdominal fetal electrocardiography ([TAfECG] top tracing in red) and fetal scalp electrode (bottom tracing in blue). Maternal heart rate signals are also displayed in light green on the top tracing. The blue and red vertical bars delimit a 10‐min (minute) period of maternal walking. Higher fetal heart rate variability can be seen in signals acquired by TAfECG. ECG, electrocardiogram; MHR, maternal heart rate; min, minute.