And what that does is it creates a high resistance and a high pressure inside the lungs. And a similar thing exists in the liver. So the lungs and the liver are not functional within that fetus. And so inside the lungs, we have a high resistance and a high pressure. And the same thing is true inside the liver. Now, if the blood were to actually move through the liver and through the lungs, that will greatly decrease the flow rate of that blood inside the fetal circulatory system.