A Doppler fetal monitor is a hand-held ultrasound transducer used to detect the fetal heartbeat for prenatal care. It uses the Doppler effect to provide an audible simulation of the heart beat. it also display the heart rate in beats per minute(BMP). Use of this monitor is sometimes known as Doppler auscultation.  It may be classified as a form of Doppler ultrasonography (although usually not technically -graphy but rather sound-generating).

Doppler fetal monitors provide information about the fetus similar to that provided by a fetal stethoscope. One advantage of the Doppler fetal monitor over a (purely acoustic) fetal stethoscope is the electronic audio output, which allows people other than the user to hear the heartbeat.