Fetal heart monitor for home use should be coated with coupling agent on the probe, and then turn on the switch, with the probe in the abdomen to find the position of the fetal heart, hear the ticking sound like a clock, is the position of the fetal heart. Listening to the fetal heart can be counted for one minute, the fetal heart between 110-160 beats is normal. After listening to the fetal heart, wipe off the coupling agent with toilet paper. When listening to the fetal heart at home, it is usually more difficult to find the location of the fetal heart, when using the probe to find the fetal heart, there will be some murmurs in other parts of the abdomen, such as placental vascular murmurs, pregnant women’s own vascular murmurs. The fetal heart is usually heard most clearly on the abdominal wall of the pregnant woman near the top of the fetal dorsum, and the sound that emerges is like the ticking of a clock. Pregnant women can listen carefully to the sound of the fetal heart during the maternity checkup, so that they can have a reference when looking for themselves. If there is any abnormality in the fetal heartbeat, you need to consult a doctor in time.