But the doctor has the nurse put a small device on the woman's index finger to measure the percentage of oxygen present in her blood. This is good, the woman can't tell him that. If she doesn't have enough oxygen she can only faint. They measure her blood pressure. They are ready if there is trouble.
Technology is on hand.
She is reassured and grateful beyond words. Finally the baby is ready to be born. The mysterious, joyful, miracle embarked upon is culminating. The miracle moment arrives. Upon arrival, a nurse picks up the baby, weighs it, measures it, and gives it a test.