Well... that gets into a completely different, and HUGE, topic... of whether or not we should be intervening in such drastic ways for (babies) that weren't meant to survive in the first place.
I mean, the primary reason cited by pro-Life people is religious/God. So one could ask, "If God didn't want that baby to survive, who are we to go to such drastic means to keep it alive."
Then you can also argue that God gave us the technology to be able to do so...
And of course that is a HUGE HUGE topic, arguing whether ANY medical intervention, of any kind, should ever be done, on any human, at any time. And whether or not modern medical miracles and the amazing breakthroughs in medical technology are all part of God's plan, and He wouldn't have given us that technology if He didn't want us to use to save every single life, etc.
So as I said, it's a huge can of worms to start talking about whether or not we should even be going to the extreme measures necessary to keep a 20-week baby alive outside the womb.
But of course all of that is completely off topic for this thread, and for my original post. :-)