Apples and oranges. To make your comparison anything close to being legit, houses would have to be living organisms and "blueprints" would be tantamount to speculating or planning on what the child of two parents might be. Houses (unlike children) are not living beings that CAN be recognized as a separate living being. . . Even when they are in the earliest stages of their life, growth and development. If putting a nail into a board did in fact begin a new house's "life" and you want to call it that? Be my guest. It wouldn't change the biological facts about when and how a child's life begins though.