Multi-sensor patch

A multi-sensor patch, configured for placement on a maternal abdomen, for simultaneous abdominal monitoring of maternal and fetal physiological data, the multi-sensor patch comprising:

• a multi-layer flexible substrate comprising a center region and a plurality of electrode regions, a conductive layer of the multi-layer flexible substrate providing an electrical connection between each of the plurality of electrode regions and the center region;
• a plurality of electrodes formed into the multi-layer flexible substrate with an electrode of the plurality of electrodes located in each of the electrode regions;
• at least one optical sensor, configured to measure on the maternal abdomen, comprising a photoemitter and a photodetector to produce photosignal data forming a pulse oximetry sensor connected to the multi-layer flexible substrate;
• and
• a module unit connected to the conductive layer at the center region, the module unit comprising a controller configured to receive biopotential data from the plurality of electrodes and photosignal data from the pulse oximetry sensor, and the controller calculates at least fetal heart rate (fHR), maternal heart rate (mHR), fetal blood oxygen saturation (fSpO2), and maternal blood oxygen saturation (mSpO2) from the biopotential data and from the photosignal data.