After the 12th week of pregnancy, a Doppler fetal heart rate monitor is often used to listen to the fetal heart. The Doppler fetal heart auscultator has no effect on the fetus and will not cause radiation to the fetus, but we should pay attention to moderation and not to listen to the fetal heart frequently, so as not to affect the fetus’ work and rest situation. The normal fetal heart rate is 120-160 beats per minute, the fetal heart rate fluctuates within the normal range is normal, the fetal heart rate is like a clock ticking sound. If you feel that the fetal movement is frequent or the fetal movement suddenly decreases or does not move, it is a manifestation of fetal hypoxia, so it is recommended to seek medical advice and go to the hospital for examination to ensure the health of the fetus. In addition to listening to the fetal heart sounds to determine the development of the fetus, pregnant women will feel the fetal movement between 18 and 22 weeks of pregnancy. The fetal movement reflects the fetus’ safety and danger in the uterus. In the middle and late pregnancy, pregnant women can count the fetal movement to know whether the fetus has oxygen deficiency in the uterus, the normal range of fetal movement is 3-5 times/h, and not less than 30 times in 12h is normal fetal movement.