Fetal hypoxia is the main cause of fetal distress, except for the decrease or disappearance of fetal movement, all other manifestations need to be detected by examination. 1, abnormal fetal movement: fetal movement is the activity of the fetus in the pregnant woman’s uterus, mostly after 20 weeks of pregnancy, the pregnant woman can feel the fetal movement. The number of fetal movements is a simple and reliable method of self-monitoring, because the number, speed and strength of fetal movements are related to the safety of the fetus in the uterus, if the pregnant woman finds that the fetal movements disappear, it mostly indicates the death of the fetus. If a pregnant woman finds that the fetus has disappeared, it is likely to indicate fetal death. In the early stage of hypoxia, the fetus is restless, which is manifested by the obvious increase of fetal movement, and when the hypoxia is serious, the fetal movement decreases, weakens or even disappears, usually the fetal heart disappears 24-48h after the fetal movement disappears, so the pregnant women need to seek medical attention when they find the fetal movement abnormal, to clarify whether the fetus has hypoxia or even fetal death in utero. 2, clinical examination: after the fetus is hypoxic, abnormal fetal heart rate will be found through fetal monitoring. Hypoxia can lead to abnormalities in the fetal central nervous system, which can be scored by observing no stress test, fetal respiratory-like movement, fetal movement, fetal muscle tone and amniotic fluid volume. In hypoxia, the score is reduced and the fetus shows reduced respiratory movements, decreased fetal movements, abnormal muscle tone such as inactivity, fully extended or slowly extended and partially flexed limbs, and decreased amniotic fluid volume. Fetal blood flow can be observed through fetal hemodynamic examination, and in the presence of hypoxia, fetal blood flow can be abnormal, etc. In addition, fetal hypoxia can cause the fetus to pass meconium. In summary, the manifestations of fetal hypoxia can be known to the pregnant woman by the abnormal frequent fetal movements in the early stage of hypoxia, followed by the decrease or even disappearance of fetal movements, while other manifestations need to be known by clinical examination.