How does the baby breathe in the uterus?

A baby does not need to breathe in the uterus. Everything that it needs for its growth is provided to it by its supply line: the umbilical cord. This cord connects the blood circulation of the child with that of the mother. The foetus, as the unborn child is called, gets nutrients and oxygen through the umbilical cord. The waste products of the foetus are thrown out into the blood circulation of the mother and are excreted by the mother. After the birth of the baby, the umbilical cord is no longer required and is cut off.