Can a baby still breathe underwater after birth if they have the umbilical cord connected to its mother?

No, a baby cannot still breathe underwater after birth even if they have the umbilical cord connected to its mother. Babies' lungs are not fully developed at birth, and they cannot breathe air until they are born and take their first breath. The umbilical cord provides oxygen and nutrients to the baby while in the womb, but it does not allow the baby to breathe underwater.