The U-shaped nuchal indentation is a result of ultrasound examination, which indicates the presence of fetal cord winding. If the fetal heart rate is normal and there are no developmental abnormalities, most of them will not have any effect. If the umbilical cord is wrapped around the neck for one week or two weeks, it may lead to lack of oxygen for the newborn during delivery. If the fetal movement count is frequent or too rare, you should be alert to the possibility of fetal hypoxia, and if necessary, do fetal heart monitoring and give oxygen therapy. The umbilical cord is very common in pregnancy tests, so don’t be too nervous, pay attention to careful observation and seek medical attention in time if you feel abnormal.