What is your baby's umbilical cord? The umbilical cord starts to form at about 4 weeks of pregnancy. It's your baby's lifeline to the placenta, the pancake-shaped organ attached to your uterus. The ...

After the cord is cut, you will see a gelatinous stump with three small blood vessels in the middle. Since there is no longer a blood supply to nourish it, the umbilical cord stump will begin to ...