The normal range for umbilical cord length is 45-50cm. However, both excessive shortness and length can impact the nutrient exchange between the mother and the fetus, potentially leading to complications like nuchal cord formation.
1. Exploring the Mysteries of the Umbilical Cord

2. What is the Optimal Length of the Umbilical Cord?
Each fetus in the maternal womb has its own umbilical cord length, but on average, it measures around 55cm or falls within the normal range of 45-50cm.
By the 28th week of pregnancy, the umbilical cord reaches its maximum length. Whether it is long or short depends on the baby's movements; the more active the baby, the more the cord tends to stretch.
3. Risks Associated with an Excessively Long Umbilical Cord
Statistics reveal that approximately 7% of childbirth cases involve an umbilical cord that is excessively long, measuring around 70-80cm.
An excessively long umbilical cord can become entangled, impacting the metabolic and nutritional exchange processes of the fetus and potentially leading to a higher risk of nuchal cord, exceeding 25-35%.

4. Hazards of an Extremely Short Umbilical Cord
Data indicates that up to 6% of fetuses have an excessively short umbilical cord. The exact cause for this shortness is not yet determined, but a simple explanation is reduced fetal movements, hindering proper cord development.
If the umbilical cord is too short, it may be stretched excessively or constricted, slowing down or completely disrupting the fetal metabolic exchange process. Consequently, newborns may be at risk of anemia or low birth weight.
History records a successful cesarean delivery and normal baby development even with a remarkably short umbilical cord measuring only 13 cm.