Questions to ask regarding legalized abortion

Later on this month, I'm going to answer the following questions regarding legalized abortion:

1.) If the unborn is not human (or not human yet), then what is it?

2.) If the the status of the unborn's humanity is not yet established, when will it be? What standards will determine when we know whether the unborn is human or not?

3.) If the unborn is human, then how is legalized abortion justified?

I'm going to let you all think on that a bit, and then I'll give my take on these questions later. In the meantime, feel free to e-mail me your thoughts on the above questions.