Number of umbilical cord vessels

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How many umbilical cord vessels are there?


Umbilical cords generally have three vessels: one vein and two arteries. The main role of the vein is to carry oxygenated blood from the placenta to the baby.  When it comes to the arteries, they carry deoxygenated blood from the baby to the placenta.  There are also some exceptions.  Imagine that in 1% of pregnancies there are only two vessels, meaning a single vein and a single artery.  If this is your case, you do not have to worry about it.  Imagine that in 75% of those cases, the baby is entirely normal and healthy.

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