Why doesn't the ultrasound show the umbilical cord around the neck?

Written by Du Rui Xia

Obstetrics

Updated on September 04, 2024

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Generally, in cases where there is umbilical cord entanglement around the neck, it can be detected through an ultrasound examination.

However, if the ultrasound does not show the umbilical cord wrapped around the neck, it is possible that the cord moved back around as the fetus moved during pregnancy. It might also be that the cord is not fully wrapped around the fetus's neck, but rather draped over the shoulder or neck. This situation could also relate to the fetal position, making it undetectable.

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Written by Du Rui Xia

Obstetrics

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Can nuchal cord be corrected by lying prone?

Nuchal cord refers to a condition during pregnancy where the umbilical cord wraps around the fetus's neck or abdomen due to the baby's continuous movements and changes in position. Lying prone cannot correct a nuchal cord because the fetus can move freely within the womb. In some cases, the baby may even resolve the issue through its movements, so there is no need for excessive worry. It is only necessary to visit the hospital regularly for prenatal check-ups, follow the doctor's advice, and monitor the fetal heart rate. Generally, this does not cause any adverse effects.

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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

1min 1sec

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What to do if the umbilical cord is wrapped around the neck once in late pregnancy?

During the late stages of pregnancy, a B-ultrasound might sometimes reveal that the fetus has the umbilical cord wrapped around its neck once. This condition is a physiological occurrence. Having the cord wrapped once around the neck does not cause intrauterine hypoxia or harm the growth and development of the fetus inside the womb. The vast majority of cases where the cord is wrapped are physiological, and whether the cord is wrapped around once or twice, there is no need for excessive worry. In the late stages of pregnancy, the most important thing when the cord is found wrapped around the neck is to monitor fetal movements. As long as the fetal movements are good, it indicates that the fetus is in a normal condition inside the womb. It is also important to keep up with regular prenatal check-ups to assess whether the fetal growth and development are normal. Additionally, it is not advised to take any action to intervene when the cord is wrapped around the neck, as neither adopting sleeping positions nor any other methods can release the cord from the neck. These methods are futile and sometimes might even harm the fetus.

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Written by Zhang Lu

Obstetrics

58sec

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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 Zhang Lu

Obstetrics

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Can you have a vaginal birth if the umbilical cord is wrapped around the neck once?

Umbilical cord wrapping is a common physiological phenomenon during pregnancy, mainly because the length of the umbilical cord during pregnancy generally ranges from 30cm to 80cm, which far exceeds the length needed for fetal growth and development. Therefore, occurrences like the umbilical cord wrapping around the neck or limbs are quite normal. An umbilical cord around the neck is not an indication for cesarean section, and a vaginal delivery is entirely feasible, even if the cord wraps around the neck once or even twice. However, due to the special circumstance of the umbilical cord being wrapped around the neck, it is crucial to pay attention during the delivery process. First, it is important to monitor the fetal heart rate closely, as umbilical cord wrapping can lead to fetal hypoxia, which would be indicated by changes in the fetal heart rate. Second, preparations for an emergency cesarean section should be in place in case of an abnormal fetal heart rate, at which point a cesarean may be necessary to terminate the pregnancy.