Does umbilical cord around the neck require a B-ultrasound recheck?

Written by Du Rui Xia
Obstetrics
Updated on April 16, 2025
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When there is a situation of umbilical cord around the neck, pregnant women need to regularly visit the hospital for an ultrasound checkup to understand the condition of the umbilical cord entanglement, mainly to monitor the umbilical blood flow. If there is an increase in umbilical blood flow, it indicates that the cord entanglement is tight, which can affect the baby's safety, potentially leading to lack of oxygen or suffocation. Therefore, in the late stages of pregnancy, it is also necessary to go to the hospital every 3-7 days for fetal heart monitoring to check if there is any lack of oxygen in the fetus while inside the womb. If there is fetal hypoxia in the late stages of pregnancy, it is advisable to terminate the pregnancy in a timely manner.

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Written by Zhao Su Min
Obstetrics
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Can you have a natural birth if the umbilical cord is wrapped around the neck once?

An umbilical cord wrapped around the neck once is generally manageable with normal delivery. An umbilical cord wrapped around the neck indicates that the cord is relatively long, or that the fetus has a large range of movement within the womb. The occurrence of the cord around the neck, if just one loop, usually does not affect the delivery and does not cause fetal distress inside the womb. If the cord is wrapped around the neck three times or more, a cesarean section may be considered to end the pregnancy. Moreover, the decision for normal delivery should also consider the baby’s size or the size of the pelvis. At 39 weeks of pregnancy, if there are no signs of labor, it is advisable to go to the hospital to check the pelvis to see if vaginal delivery is possible. If vaginal delivery is possible, one can wait; if not, a cesarean section is recommended.

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Written by Zhang Lu
Obstetrics
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Is it dangerous for the umbilical cord to be wrapped around the neck during the mid-stage of pregnancy?

During a mid-pregnancy ultrasound, it is sometimes indicated by the presence of a U-shaped or W-shaped notch behind the fetus's neck that the fetus may have the umbilical cord wrapped around its neck. During pregnancy, it is perfectly normal for the umbilical cord to wrap around the neck, and it generally does not affect the fetus or pose any danger. The length of the umbilical cord during pregnancy is approximately 30 to 80 centimeters, which is quite long relative to the size of the uterine cavity. Hence, many umbilical cords have excess length that can wrap around the neck or limbs of the fetus, leading to the umbilical cord being coiled around the neck or limbs. However, current research indicates that whether the umbilical cord is wrapped around the neck or limbs once or twice, it does not affect the fetus. It does not cause intrauterine hypoxia or affect the growth and development of the fetus, nor does it influence the mode of delivery. A natural childbirth can still be an entirely viable option.

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Written by Du Rui Xia
Obstetrics
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Can ultrasound detect nuchal cord?

During the color ultrasound examination, it is possible to detect whether the fetus is experiencing umbilical cord entanglement around the neck. If the ultrasound shows a V-shaped echo around the fetal neck, it generally indicates that the umbilical cord is wrapped around once. If the echo is W-shaped, then the cord is wrapped twice. If the cord is wrapped multiple times, the echo will appear serrated. Additionally, the color ultrasound can also assess the blood flow around the umbilicus to determine the presence of umbilical cord entanglement. If cord entanglement is detected, it is recommended to have regular ultrasound check-ups at the hospital to monitor the fetus's safety in the uterus.

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Written by Du Rui Xia
Obstetrics
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Can I walk for an hour after meals if the umbilical cord is wrapped around the neck?

In cases where there is umbilical cord entanglement around the neck, as long as the baby's fetal heart rate and fetal movement checks are normal, the mother can normally go for a walk after meals. This condition will not affect the fetus. It is important to regularly visit the hospital for fetal heart monitoring and prenatal examinations, pay attention to observing changes in fetal movement inside the womb, and avoid doing overly heavy or intense exercises. If any abnormalities in fetal movement or heart rate are observed, it is necessary to go to the hospital for examination. When needed, oxygen intake and treatments to preserve the pregnancy might be required.

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Written by Du Rui Xia
Obstetrics
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How to count fetal movements when the umbilical cord is wrapped around the neck

When there is nuchal cord presence, it is important to determine the number of loops around the neck as well as the tightness of the loops, to assess if they might affect the fetal heart rate. Generally, nuchal cords do not impact fetal blood circulation, so fetal movement can still be measured normally. Proper measurement should be taken at fixed times each day: morning, noon, and evening—for example, at 7 AM, 12 PM, and 9 PM respectively. During each of these times, select one hour when you can calmly and attentively feel and count the baby’s movements in a quiet setting, and record the number of movements.