Ultrasound Doppler fetal heart rate monitor TX-103 Fetal heart rate monitoring device is a device that can detect the fetal heart rate through the principle of ultrasound Doppler. Pregnant women can monitor the fetal heart rate value in real time at home. It is easy to operate, portable and compact, and can achieve early monitoring and close monitoring of fetal heart rate, so as to timely detect high-risk fetuses and protect fetal health