Fig. 1From: Feasibility of non-invasive Foetal electrocardiography in a twin pregnancyIllustration of the non-invasive foetal electrocardiography (NI-fECG) device and electrode patch. The left picture shows the electrode patch applied on the maternal abdomen and attached to the amplifier and a computer. The right picture shows the electrode patch with the numbered electrode channels and the ground (GND) and reference (REF) electrodeBack to article page