The Atheist Obsession with Insulting Christians

[Kingpin]

But you realize that a fetus made no choice in being created in your body, but is a direct result of a choice you made.  (again, notwithstanding cases of rape).

Irrelevant; see above.

I don't think its irrelevant.  The kidney example, while I understand the point, is not the same in my opinion.  We don't know the circumstances and intent in that scenario.  We are talking the basics of human reproduction that everyone knows.  When you have consensual sex you go in to it knowing that a possible result is a pregnancy.  It is my personal opinion that you are willing to give up those rights to bodily autonomy knowing that the sexual encounter may result in the conception of a human being.  It may not be the intention but you certainly know it's a possibility.  

Again, though I would like to understand why people feel its ok to abort in the first trimester but not in the third.  Baby is still in utero and still living off the mothers resources.  Is it the heartbeat (as early as 18 days)? Is it because the baby moves (as early as 4 weeks)?  Because there is brain activity (10 weeks)?