Other reasons could be:

1. deformity of the child, severe abnormalities,
2. To save the life of the mother.

well, for what other reasons? by whose definitions? again, i think as long as abortion is legal, the motivations or reasons for having them should be nobody's business. start trying to draw lines about 'viability' or 'convenience' or true intent or whatever else, and you're entering into a morass that's unsolvable and, more importantly, inconsistent and unnecessary.

All of your dramatic rhetoric to the side, if you come the conclusion the "potential life" inside the mother has a value and has to be protected, then yes, it is a balancing test as to when she can terminate "potential life". The government tells us when and why we can terminate people and this is no different if you conclude the "potential life" is more than a bunch of cells. If you do not, then sure, go ahead and terminate it right up to the delivery date.

see, that's the problem in civil society. you think your imperatives rank higher than mine.

in my opinion, the only way to run a republic is to treat governance as if there is no god. that way, no one 's god is favored. i think god wants you to run your religious life that way too(and, generally, you do). god created the physical world to adhere to the rules of physics he created. he, not you, determines when to interrupt this for a miracle. we can't assume a miraculous world. we must assume the physical world, and it's up to him to break into your regularly scheduled programming for a miracle. if that's how he's ordained us to live as christians, how much more so in a secular govt.

if the potential for life = life, and this theory is to be embedded into statute (which is what i think you'd prefer) then by definition you must treat the 9 puppies inside your dog as if they are all fully formed dogs. murder 9 dogs, go to jail. you're right, you won't go to jail as long as you would if you murdered 9 humans, but go to jail you will, today (no, it's not simply a civil offense) if a video of you were produced showing you traveling around murdering innocent dogs.

you make an assumption when quickening occurs. your assumption is that it's at the point the sperm fertilizes the egg; or, at the point the fertilized egg implants in the uterus. i don't mind you making that assumption. i just would prefer that your view - which may be wiser than mine - is respected; and that my view is likewise respected. that our views are equally respected. that your view of what's important is not higher than mine.

I guess you just won't address the question of whether you are willing to remove or let society remove from the woman her right to determine what to do with her body. I do wonder why that is, though. You seem to not want to discuss the real world consequences of your position.