How do babies breathe in the womb without drowning?

Fast facts on how babies breathe in the womb:

The umbilical cord is the main source of oxygen for the fetus. As long as the umbilical cord remains intact, there should be no risk of drowning in or outside the womb.

How do I know if my baby is not getting enough oxygen in womb?

If the oxygen deprivation occurred throughout the delivery process, the baby may be blue at birth, have no breath sounds, no cry, poor muscle tone or a low heart rate. The baby’s APGAR score may be low and arterial blood gas testing may show a low pH (ie: <7.1) or an elevated Base Excess.