High FVR refers to high umbilical cord blood flow resistance index. In the second trimester, you need to go to the hospital regularly to check fetal umbilical blood flow. High fetal umbilical blood flow is caused by many factors, which may be due to problems such as placental abnormalities or umbilical cord factors, which can cause fetal hypoxia. Complications during pregnancy, such as gestational hypertension, can have high fetal umbilical blood flow and chronic fetal hypoxia due to placental hypofunction. If the umbilical cord torsion is more severe, the umbilical cord blood flow resistance index will be elevated, and in severe cases, blood flow may be interrupted and intrauterine fetal death may occur within a short period of time. If the FVR is high, prompt oxygenation and intrauterine treatment are required. If the cord blood flow returns to normal after oxygenation, the pregnancy should be continued under close supervision. If the umbilical blood flow continues to be elevated and fetal heart monitoring indicates abnormalities, this situation requires prompt treatment and preferably a cesarean section to avoid dangerous situations. It is important to check not only the development of the fetus during pregnancy, but also to always check for symptoms of hypoxia to avoid intrauterine asphyxia and death.