At 20 weeks of gestation, the normal fetal heart rate is between 110 and 160 beats per minute. A fetal heart rate <110 beats/min is called bradycardia and a fetal heart rate >160 beats/min is called tachycardia. In addition, the fetal heart rate may change in a transient manner, which is normal and should not be overly worried. In determining whether the fetal heart rate is abnormal or not, you cannot judge only by one fetal heart rate, you need to judge whether the fetal heart rate is normal or not by the fetal heart monitoring performance for more than 10-20 minutes. The fetal heart rate is too high 1. If the fetal heart rate increases during fetal movement, it is also normal and more common, after a period of time the fetal movement is more stable, the fetal heart rate can fall back to the normal range, no need to worry; 2. If the fetal heart rate continues to be too high, consider whether the pregnant woman’s heart rate increases. If the pregnant woman herself is tachycardic, the child’s heart rate will also increase accordingly; 3, consider whether the pregnant woman has an infection, such as intrauterine infection or infection of the pregnant woman itself, may also cause a high fetal heart rate, need to be alert, because the infection is more dangerous to the fetus. 2, fetal heart rate is too low 1, if the low fetal heart rate persists, the fetus may have a lack of oxygen; 2, pregnant women taking certain drugs or fetus suffering from congenital heart disease can also cause the fetal heart rate continues to be too low, should promptly go to the hospital for examination.
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