In this episode of "THE BODY," takes us back to the starting point for all human beings - birth. From a fertilized egg, through the division of microscopic cells, the formation of internal organs, to the first cries of a newborn in the delivery room, we trace the complex interactions between mother and baby that transform a tiny fetus into a living, breathing person. The latest imaging technology helps you witness the process from the inside to help you understand the wonders of human development.