Maternal and fetal monitoring systems and methods

A patient monitoring system configured to measure maternal electrophysiological signals, the system comprising:

• a set of electrodes configured to obtain a uterine activity (UA) signal and a total abdominal electrical signal from an abdomen of a maternal patient, wherein the total abdominal electrical signal includes at least the UA signal, a maternal heart signal, and a fetal heart signal;
• wherein at least a subset of the set of electrodes is configured as a low pass filter to obtain the UA signal;
• and
• a patient monitor configured to:
• receive the UA signal and the total abdominal electrical signal obtained by the set of electrodes;
• subtract the UA signal from the total abdominal signal to generate a total heart signal containing at least the maternal heart signal and the fetal heart signal;
• determine a maternal heart rate based on the total heart signal;
• and
• output the UA signal and the maternal heart rate.