Without adequate oxygen supply to the brain, the rest of the body can not get the signals they need to function. (thesprucepets.com)
But even during exercise our innate respiratory - control system usually does quite well at providing adequate oxygen supply and removing carbon dioxide produced by metabolism. (scientificamerican.com)
They can result in fetal distress, meaning that the baby's not getting adequate oxygen, and they can even result in fetal death. (npr.org)