Noninvasive Recording of True-to-Form Fetal ECG during the Third Trimester of Pregnancy

Figure 1

Schematic representation of the developed system. Standard Ag-AgCl electrodes are placed on the mother’s abdomen. Preamplified signals are sent telemetrically to the receiver, where the first steps of signal processing happen. The collected data are transmitted through an A/D converter to the computer. Doppler signals are used to synchronize the fetal heart events.