Ultrasonic probe, fetal heart rate meter and fetal heart rate detection system

The utility model relates to an ultrasonic probe, a fetal heart rate meter and a fetal heart rate detection system, the ultrasonic probe is characterized in that a shell is provided with a first end and a second end which are oppositely arranged, the first end is used as a detection end, the detection end is suitable for being in contact with the abdomen of a human body, and the cross sectional area from the first end to the second end is gradually reduced; the ultrasonic assembly is arranged in the shell and comprises a transmitting end and a receiving end, the transmitting end faces the detection surface and is suitable for transmitting an ultrasonic signal, and the receiving end is suitable for receiving a reflected wave signal, reflected from a target object, of the ultrasonic signal; the first control assembly is arranged in the shell and is suitable for receiving the reflected wave signal and processing the reflected wave signal. When a user uses the ultrasonic probe, the user can conveniently hold the