Royal Baby

There is much media attention being given to the child to be born to Kate and Wills, e.g. what title will this heir to the throne have, etc.  There is one thing that puzzles me.  By the law of most (European and American) lands, and, sadly, by the doctrine of most churches these days, whatever it is that the Duchess of Windsor is carrying inside her is not a baby or a child but a tissue blob that could be aborted anytime now without legal consequence or moral scruples.  How can the world call this fetus a child when, de facto, the growing thing in her womb is not officially a child until it is born (if then)?  It seems strange that a royal fertilized egg immediately gets status as a human being, and a very privileged human being at that,  while the baby bump of a commoner is not quite human.  Would that all life was so  respected and cherished!