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 ...

When a baby is born prematurely, doctors often snip the umbilical cord and whisk the infant away for immediate medical intervention. But a new meta-analysis suggests they should not be so quick to ...