The fetal heartbeat is the heartbeat of the fetus in the mother’s womb. It can reflect whether the fetus is alive in the womb or not, and should be treated immediately if there is no fetal heartbeat at the time of labor and delivery. The normal fetal heartbeat is 110-160 beats per minute, and the fetal heartbeat of ultrasound examination usually appears when the pregnant woman is 6 weeks pregnant, but depending on the development of the fertilized egg, the fetal heartbeat of some fetuses may appear a little later, if the fetal heartbeat does not appear in the ultrasound examination, it may be considered as fetal abortion and needs to be cleared in time; if you are more than 3 months pregnant, the doctor can usually apply Doppler fetal heartbeat through the abdomen during the maternity examination. The fetal heartbeat is usually heard by the doctor during the labor and delivery examination. The position of fetal heart is located in the lower abdomen near the perineum before 20 weeks, due to the movement of the fetus in the uterus, the position of the fetal heart is not fixed, as the gestational age increases and the fetus grows, the fetal heart will appear on both sides of the belly button when the development reaches 6-8 months, by the late pregnancy when the fetus is in the head position into the pelvis, the position of the fetal heart may be relatively fixed on both sides below the umbilicus. In case of breech position, the fetal heart can be on the left and right side of the umbilicus or above the umbilicus; if it is difficult to auscultate the fetal heart can be seen directly by abdominal ultrasound. If the fetal heart is found to be absent on ultrasound, intrauterine fetal death has occurred. There are many reasons for this, the common reason is the umbilical cord factor, in the middle of pregnancy, the amniotic fluid is relatively more, the fetus has more space to move in the uterus, freely swimming in the amniotic fluid, it is inevitable that the twisting of the umbilical cord, the twisting of the umbilical cord, or even the knotting of the umbilical cord, and eventually fetal death may occur in the uterus, once diagnosed, hospitalization should be promptly induced. However, there are also cases where no cause can be found and further chromosomal or genetic testing may be needed to find the cause. The doctor should listen to the fetal heartbeat at every maternity checkup. At about 18 weeks of gestation, the pregnant woman can feel the fetal movement, but she cannot count the fetal movement because there is a lot of amniotic fluid and the fetal movement is active at this time, so it is not easy to count. However, after 28 weeks, pregnant women are encouraged to count the fetal movements for an hour in the morning, in the afternoon and in the evening, more than 3-5 times per hour, or more than 30 times in 12 hours, which is considered normal. If the fetal movement is less than 3 times an hour and disappears less than 30 times in 12 hours, you should consult a doctor in time, and once the fetus is determined to be in danger, timely measures will be taken to rescue it.