A question.

I pose a simple question for Christians.
Is all human life sacred?
In Religious Studies examination courses, this is taken as read; the argument being that it is 'God-created' - and that proves the point.
That is just a little too pat for me - it is seldom debated and extremely difficult to prove as a Christian concept.
I am unsure of the answer - just wanted to make you think! (Knee jerk responses are not helpful here.)