The normal fetal heart rate range is 110-160 beats/min. If the fetal heart rate is higher than 160 beats/min, pay attention to whether it is a transient high fetal heart rate or a continuous high fetal heart rate. The common reasons are generally the following, need to be timely judgment: 1, fetal activity: the fetus in the mother’s body overactive, will cause an increase in the frequency of the heartbeat, which will prompt the fetal heart rate to increase, appear transient fetal heart rate, generally stable fetal movement can return to normal, do not need to do special treatment; 2, early pregnancy fetal development: early pregnancy fetal cardiovascular development is incomplete, can appear fetal heart rate increase, late pregnancy can return to normal; 3, early pregnancy fetal cardiovascular development, the fetal heart rate increase. 3, environmental factors: such as pregnant women after exercise, emotional stress, taking drugs or hyperthyroidism and other diseases, pregnant women appear to increase the heart rate, resulting in fetal heart rate, generally after the exclusion of factors affecting the fetal heart rate can return to normal; 4, fetal hypoxia: when the placenta premature or umbilical cord around the neck, etc., may lead to fetal hypoxia, fetal heart rate increase; 5, intrauterine infection: intrauterine infection will appear The fetal heart rate will increase, often accompanied by fever, abdominal pain and abnormal discharge of the pregnant woman. In addition, very few can occur due to abnormal fetal cardiovascular development in late pregnancy, which can lead to increased fetal heart rate.