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PRACTICES A NI-fECG recording was carried out at 25 + 3 months of gestation on a multiparous woman pregnant with dichorionic diamniotic twins. An electrode plot consisting of eight adhesive electrodes was applied on the maternal abdomen, yielding six channels of bipolar electrophysiological measurements. The production was digitized and stored for offline handling. The recorded signals had been preprocessed by suppression of high-frequency sound, baseline wander, and