This fetal doppler is a hand-held obstetrical unit, which can be used in hospital, clinic and home for daily self-check. It is specially designed for family of pregnant woman to conduct daily inspection of Fetal Heart Rate (FHR) by themselves. It contains components of ultrasonic signal transmitter and receiver, analog signals processing unit, FHR calculating unit, LCD display control unit etc. The fetal doppler is a high performance model with (fetal heart rate) LCD digital display. It has 3 work modes: Real-time FHR display mode, averaged FHR display mode, and manual mode. All three models have audio output, and can be connected with earphone or recorder with audio input.