Fetal heartbeat refers to the heartbeat of the fetus. Fetal heart monitoring is the monitoring of the fetus in the uterus by instruments. At 32 weeks of gestation, the normal value of fetal heart monitoring is 110-160 beats/min. Fetal tachycardia can be diagnosed if the fetal heartbeat is consistently greater than 160 beats/min for more than 10 minutes. If the fetal heart rate is consistently below 110 beats/min for 10 minutes consider it as fetal bradycardia. Tachycardia and bradycardia are both abnormal conditions that indicate possible intrauterine hypoxia and require intrauterine resuscitation, which is commonly performed by placing the mother in the left lateral position with appropriate rest and oxygen. In addition to fetal heart monitoring, pregnant women should undergo fetal heart monitoring. Generally, fetal heart monitoring needs to be done for more than 20 minutes. On the graph of fetal heart monitoring, if there is recurrent late deceleration or variant deceleration, it indicates acute intrauterine distress and should be treated as soon as possible. In addition, maternal condition can also affect the fetal heart rate. If the pregnant woman has a body temperature greater than 37°C or has hyperthyroidism with increased pulse rate, the fetal heart rate will also be accelerated to some extent. During the prenatal checkup at 32 weeks of pregnancy, in addition to fetal heart monitoring, we should also pay attention to whether the pregnant woman’s blood pressure is normal, and we need to measure the uterine height and abdominal circumference to determine the size of the fetus. It is also recommended to do fetal 3D ultrasound to note the presence of fetal malformation and to measure the size of the fetus.