Did you know that babies ...?

Actually, fingerprints are formed by the amount and rate that blood flows to the baby. The "tail you speak of is just the bottom of the spine because it is longer than the rest of the baby and goes away midway through the pregnancy. And the "Gills" are not gills. They are just formed where the ear buds are in early development. Air does not go through the umbilical cord. Nutrient rich blood which sustains the baby does. If air were in veins or the cord it would cause a myocardial infarction (heart attack). A baby can be born by Cesarean section, l birth, underwater l birth, breech, face up, & face down.