Fetal heart monitoring is usually done after 34 weeks, and can be done as early as 32 weeks or even around 30 weeks in abnormal cases. For pregnant women with no special conditions, no pregnancy complications and no complications, the general situation is to start fetal heart monitoring after 34 weeks. However, for some pregnant women with pregnancy complications, such as hypertensive disorders of pregnancy, because elevated blood pressure can cause placental abruption and intrauterine asphyxia and death of the fetus, therefore, it is necessary to advance the time of fetal heartbeat monitoring, which can be started at 32 weeks or even 30 weeks. In case of abnormal fetal heartbeat, it is recommended to consult a doctor in time, analyze the situation carefully, make correct judgment and treatment, and terminate the pregnancy at the right time if fetal hypoxia does exist.