Single-artery umbilical cord problems only happen in around 1% of pregnancies, although the risk increases to 5% for twin pregnancies. A lack of one vessel is called a two-vessel cord. This ...

The umbilical cord delivers vital nutrients from your body to your baby, and ferries away the waste your baby produces. It ...

This condition is often called a two-vessel cord. Sometimes, a single umbilical artery can indicate other problems with your baby’s kidneys or digestive system. Vasa previa: ...

Learn more about this type of umbilical cord. Skip to main content . Home ... They also lack the protection of the gel-like substance that fills the umbilical cord and cushions the blood vessels.

On the Cause of the Spiral Direction of the Umbilical Vessels, and the Convolutions of the Cord in the Human Foetus. By John Simpson, Esq, F H S C., L H.C.P., Surgeon, Royal Na. val Hospital, Haslar.