Fetal heart monitoring is a mandatory test during pregnancy. It is usually performed more frequently in late pregnancy, and the duration of one monitoring session is about 20 minutes, which can be extended to 40 minutes in special cases. Fetal heart rate monitoring is a graphic recording of the fetal heart rate curve and contraction pressure waveform for clinical analysis using an electronic fetal heart rate monitor, which is the main test to correctly assess the intrauterine condition of the fetus. Fetal heart rate monitoring can be performed after 12 weeks of pregnancy. However, it is normal to do it from 28 to 36 weeks, depending on your health condition and the doctor’s schedule. The rate of passing fetal heart monitoring is usually higher in the morning, depending on the time of day when the fetus is active. Each fetal heartbeat monitoring usually lasts for 20 minutes and the fetal heartbeat can be heard, while the contractions are recorded on paper by the fetal heart monitor. The frequency of fetal heart monitoring check is higher in late pregnancy, when it is necessary to closely observe the fetus in the uterine cavity, to know whether there is any fetal hypoxia, and to be able to correctly assess the condition of the fetus in order to make the most timely treatment. Therefore, fetal heart monitoring is the most direct, non-invasive and painless test that can tell the condition of the fetus in the uterus. During pregnancy, pregnant women must perfect their pregnancy checkups, find abnormalities and seek medical attention in time.