A two-week fetal bypass is difficult to correct artificially. Two weeks of fetal nuchal circumference usually belongs to the more common situation, because the fetus is in the uterus, free to move, so it is difficult to be corrected by artificial means. Fetus in the uterus continues to grow and develop, the fetal body gradually increases in size, the umbilical cord in the fetal activities on the surface of the fetal body for winding, the formation of the neck around the neck, usually do ultrasound can be found in the neck of the fetus has w-shaped cut trace. When the umbilical cord is compressed, it will lead to insufficient oxygen supply to the fetus, and the fetal movement will decrease, we should carry out a comprehensive examination to assess the condition of the mother and child, strengthen the fetal heart rate monitoring, and pay attention to the changes of the fetal movement. Generally, two turns of umbilical cord around the neck does not affect the fetus much, but if the umbilical cord is too short and tightly wound, it may cause fetal hypoxia, acute fetal distress may occur, and the pregnancy should be terminated urgently.