The timing of fetal heart monitoring during pregnancy needs to be judged according to the specific situation of the pregnant woman and cannot be generalized. Generally speaking, as a routine checkup in the late pregnancy, if the health condition of the pregnant woman and the development of the fetus are relatively normal, this is a physiological pregnancy without any complications, and fetal heart monitoring can be done once a week starting from 36 weeks of pregnancy; if the pregnant woman has hypertension, hyperglycemia or fetal growth restriction and other complications, this is a pathological pregnancy, and the time of fetal heart monitoring should be advanced, if the condition is If the condition is stable, it can be done routinely once a week starting from 34 weeks of pregnancy; if the condition is unstable, it is necessary to advance the examination to an earlier gestational week according to the condition, and it is also necessary to examine more frequently. If the condition is unstable, you need to start checking earlier and more frequently according to your condition.