Fetal heart monitoring can be done at 34 weeks of pregnancy. In case of high-risk pregnancy, fetal heart monitoring examination can be started at 32 weeks of pregnancy, which can help to determine the intrauterine condition of the fetus and terminate the pregnancy in time if necessary. Fetal heart monitoring is a commonly used obstetric examination method. Through the curve traced on the fetal heart monitor by the fetal heart probe, contraction probe and fetal movement recording probe, the relationship between fetal heart rate and contraction and fetal movement can be assessed, and the biophysical scoring can be performed with reference to other findings such as fetal respiratory movement under ultrasound to determine whether there is any hypoxia or acidosis in the fetus in the uterus. Because of the smaller gestational weeks, the relatively large space for the fetus to move, more fetal movement, and less obvious respiratory movement under ultrasound, etc., fetal heart monitoring is generally recommended to start at 34 weeks of pregnancy. For high-risk pregnancies, such as previous high-risk pregnancies, previous history of stillbirth, hypertensive disorders in pregnancy, gestational diabetes and other medical history of pregnant women, the risk of intrauterine hypoxia of the fetus is high, can be carried out from 32 weeks of fetal heart monitoring, attention to the fetus in the uterus, regular obstetric examination, timely termination of pregnancy, if necessary, to avoid adverse pregnancy outcomes.