The train of illogic you people use leaves me underwhelmed. So at what magical moment surrounding the two week mark does the (insert whatever euphemistic term you currently use to describe IT) suddenly become a human being? When the first dedicated brain cell appears? The second, fourth, eighth?
To avoid the argument of what stage of development it is a human - when the first appears.
Since it is not practical to measure how many brain cells there are - after 2 weeks of development.