Does the umbilical cord wrapping always involve the neck?

Written by Du Rui Xia
Obstetrics
Updated on January 25, 2025
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Umbilical cord entanglement around the neck usually occurs during the mid-pregnancy period, as this is when the baby moves more frequently. The baby has a larger range of movement within the uterine cavity, which can easily lead to the cord wrapping around the neck, abdomen, legs, or arms. Generally, if there is no cord entanglement found after 32 weeks of pregnancy, it is unlikely that it will occur. However, this is not certain. After the baby engages, which is after 35 weeks, the baby's position becomes fixed, and it is unlikely for cord entanglement to occur thereafter.

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Written by Du Rui Xia
Obstetrics
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Is climbing stairs useful for umbilical cord around the neck?

When there is a situation with the umbilical cord wrapped around the neck, pregnant women should absolutely not blindly try certain exercises, such as climbing stairs, which actually have no scientific basis. Doing so not only fails to alleviate the condition of the cord being wrapped but might even increase the baby's activity, leading to a more serious entanglement. During the mid-stage of pregnancy, pregnant women should pay attention to rest, avoid exhaustion, and sometimes the baby's movements might even resolve the wrapping of the cord. Therefore, it is important to take scientific care during pregnancy and follow the doctor's advice, and not to engage in any exercises on one's own.

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Written by Du Rui Xia
Obstetrics
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Can the umbilical cord unwrap itself after it has wrapped around the neck and entered the pelvis?

When the fetus has already engaged and there is nuchal cord occurrence, it is generally unlikely for the wrapping to unwind again. This is because once the fetus has engaged, the fetal position is fixed, and the fetus will no longer change its position, making the nuchal cord a more fixed condition. When dealing with nuchal cord, it is important to observe the number of loops and whether the tightness of the loops could impact the fetus. Therefore, it is necessary to regularly attend prenatal appointments at the hospital to monitor its developmental condition. If the nuchal cord loops just once around the neck, it usually does not affect the baby.

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Written by Liu Wen Li
Obstetrics
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How to correct nuchal cord with one loop?

Nuchal cord occurs because the fetus moves frequently within the uterine cavity, which can result in the umbilical cord looping around the neck once, referred to as a single-loop nuchal cord. In fact, it is not correctable because it is impossible to physically reach the umbilical cord or the fetus during pregnancy. Moreover, a single-loop nuchal cord is quite common, occurring in about one-fifth of all pregnancies. If the loop is loose or the umbilical cord is sufficiently long, there is generally no significant impact on the baby. However, if the loop is tight, it can pull on the umbilical cord, causing the blood vessels within the cord to narrow. This may lead to noticeable changes in fetal movements and heart rate. Therefore, with a nuchal cord, it is important to enhance monitoring and pay attention to changes in fetal movements and heart rate.

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Written by Zhang Lu
Obstetrics
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What should I do if the fetal umbilical cord is wrapped around the neck once?

During the prenatal ultrasound, it is sometimes discovered that the umbilical cord is wrapped around the fetus's neck, which concerns many pregnant women who fear it may cause fetal hypoxia in utero or affect natural childbirth. However, this concern is not accurate. Currently, in clinical practice, an umbilical cord around the neck is considered a normal physiological phenomenon. Around 30%-40% of fetuses may have the umbilical cord wrapped around their neck. It is acceptable for the umbilical cord to be wrapped around the neck once or twice, as this neither impacts the fetus's oxygen levels nor affects the mode of childbirth; natural birth can still be considered. Therefore, when the umbilical cord is wrapped around the neck once, no intervention is required. Follow the normal prenatal check-up routine and pay attention to fetal movements in daily life. As long as the fetal movements are normal, it indicates that the fetal condition in the uterus is good.

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Written by Du Rui Xia
Obstetrics
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What will the fetal movement be like if the umbilical cord is wrapped around the neck?

Generally, when the umbilical cord is wrapped around the neck, it often does not affect the fetal movement or fetal heart rate changes. It is quite common for the cord to be wrapped around once, and if the wrapping is loose and does not affect the blood supply from the placenta, fetal movement will not change. However, if the cord is tightly wrapped multiple times, it can affect the blood supply of the umbilical cord and impact the fetal blood circulation, leading to frequent fetal movements. Therefore, pregnant women should learn to count fetal movements themselves to understand if the fetus is experiencing hypoxia in the womb.