Regarding Exodus 21:22-25. When we're talking about eye for an eye, and applying this to the "no mischief" situation. That would mean that whoever accidentally killed the baby had not taken away that couples ability to have more children, right? However, if he's killed the wife, he takes away that man's ability. So if a fine is paid, we can assume she's healthy because no "mischief" had followed, and is then potentially capable of restoring what they had lost. Which, in this case, is their child. I don't believe it specifically means that the child is less valuable. And considering that God says in his word how precious little children are in the kingdom of heaven, we can assume that this child would have gone to be with Him, would this have happened. And the couple, while obviously distressed at missing that child, do have the capability to be blessed with another. What they've LOST here is time and resources in assuring this one's health. Not the possibility of ever having one. So under the "eye for an eye" rule, it seems logical that he would pay a fine. Restitution for the husband. However, if mischief means the mother dies, or is then barren, they can no longer have a child. Can no longer bring forth a life. And since that's what was taken, he'd pay with his life. At least this is how I felt when praying about it last night. ( Much like when Job lost his children and was given more. Several times in the bible we see God outline the giving of children as a blessing from Him.) I don't see this as a concrete layout of how much God values the unborn vs the born anymore than I feel a woman's "unclean period after giving birth" is any longer or shorter based on what gender her child was. I suppose we could all argue all day and give "scriptural evidence" defending our own feelings on the matter, but speaking from a strict "word by word" basis on this scripture, I'd have to see quite a bit more evidence than this to suggest it means God does not view an unborn child as one of His children yet.
As far as the "breath of life" is concerned, I think it's that divine "special ingredient" that turns a heap of elements into a living, breathing, thinking, feeling being. At what point that occurs in the process of reproduction, I can't say I know for sure. Though that'd be a really interesting study.
Moving on to the granddaughter. No matter what the circumstances, the "lesser evil" is to let that girl make her own decision. And no matter what she decides, God can turn it to good. I don't believe it's anyone else's place to say what God's plan in that situation is. For all we know, the child may be stillborn, make the girl sick, and kill her. So not only is there no life inside, but she'd lose her own life for the mere fact that she'd already suffered so much and was trying to do the "right thing". But I don't believe the "right thing" is always what we think it is. The word says that even gentiles (that's us, by the way. We were never under the law.) who don't have the law show that they contain the laws of God within their hearts by the actions they commit, and the feelings of what's "right and wrong" in their hearts regarding their decisions. So what if this girl gets an abortion? Do my personal feelings about MOST abortions apply here? Hardly. This is a decision between this girl and the Heavenly Father. And for those who doubt the spiritual strength of one so young, we can look at David when he beat Goliath. Not too young to be brave and listen to God's voice there.
We always get ourselves into trouble assuming we know God's will in a situation. And following "the letter of the law" or, in even more worrisome cases, our own personal convictions. But the truth is we have no idea if God's plan entails her keeping this child or not. And we certainly don't have the authority to claim any differently. In short, the "appropriate thing" in this scenario is to pray. And to use this "complex case" to show us that our little checkbox system of right and wrong is not for God's glory. It's to satisfy us when we don't know the path that should be taken. We take comfort in our own convictions instead of seeking out the will of God. God is much bigger than "pro life" or "pro choice". He allows suffering all the time. It's what happens in the wake of that suffering that gives glory to His name. And I highly doubt whether this poor little girl decides she can keep this child or not will change His awesome ability to take hold of this situation and turn it to good.
All I can say is that my prayer list just got a little longer.