The impact of umbilical cord entanglement on the fetus is quite significant. If the entanglement is excessive and tight, it can lead to fetal hypoxia. Generally, fetuses with the umbilical cord wrapped around the neck once or draped on the neck do not show clinical symptoms. However, if the entanglement is tight, it can jeopardize fetal health. During an ultrasound examination, echoes can be seen on the fetus's neck where the umbilical cord is wrapped, and distinct pressure marks may appear on the skin. A single wrap around the neck appears as a U-shape, two wraps appear as a W-shape, and three wraps as a serrated shape.