The fetal Doppler monitor either doppler heart rate monitor It is a handheld/portable ultrasound transducer used to detect the heartbeat of a fetus during prenatal care. Use the Doppler effect to provide an audible simulation of heartbeats. Some models also display the heart rate in beats per minute. The use of this monitor is sometimes known as Doppler auscultationA Doppler fetal monitor provides information about the fetus similar to the information provided by a... stethoscope fetal. One advantage of the Doppler fetal monitor over a acoustic stethoscope (Non-electronic) fetal heart rate monitors produce sounds that allow others, besides the user, to hear the heartbeat. Originally created for use by healthcare professionals, they are now becoming more popular for personal use.