A newborn's umbilical cord stump typically falls off within about two weeks after birth

Umbilical Cord
A newborn’s umbilical cord stump typically falls off within about two weeks after birth. In the meantime, treat your baby’s umbilical cord stump gently. … In the meantime, treat the area gently:

Keep the stump dry. … Stick with sponge baths. … Let the stump fall off on its own.
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In placental mammals, the umbilical cord (also called the navel string, birth cord or funiculus umbilicalis) is a conduit between the developing embryo or fetus and the placenta.

After your baby’s birth, her umbilical cord is cut. … While the stump is drying up and just after it falls off, you might notice some oozing around the baby belly button. This might be clear, sticky or brownish, and it might leave a mark on your baby’s clothes or nappy. It might also smell a little.
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Signs of Umbilical Cord Infection

Red, swollen appearance.

A fluid-filled lump on or near your baby’s umbilical-cord stump.

Oozing pus or any foul-smelling discharge.

Bleeding from the scab (though a little dried blood is normal)

Fever.

Lethargy, low appetite, irritability.

Abdominal swelling.