The case for life beginning at conception

A great summary of the strictly scientific case that life begins at conception -- some helpful thoughts for discussing the subject with friends who are not religious.:

The point where a life begins is the point where we can say, by reasonable and not arbitrary criteria, that a new organism has begun to exist. We identify it not by looking for the point where the organism can survive on its own, or the point where it no longer needs protection and nutrients. We don't even look for the point where we find unique genetic codes, although that may be a clue. Rather, we identify it by looking for the point where an independent being exists that is innately structured and ordered toward development as a member of the species.

Read the whole thing here.