A conformal fetal heart monitor includes a flexible substrate and a ultrasonic transducer array, coupled to the flexible substrate, that generates an ultrasonic transmission signal over a sequence of beam angles, that receives an ultrasonic return signal, and that generates an ultrasonic receive signal in response to the ultrasonic return signal. A transducer interface couples the ultrasonic receive signal to a processing system. A flexible housing that houses the flexible substrate, the ultrasonic transducer array and the transducer interface, wherein the flexible housing flexibly, when deployed, conforms to the surface of an abdomen of a patient.
