It is a decision that she has to make for herself - with the help of her partner, family, spiritual adviser and God. It cannot be forced upon her by the government. THAT is the liberty she possesses - she needs to be free to make that decision based on her own values and conscience - not the religious diktat of the State.
I'm assuming you are defending that "right" regardless of whether or not the woman was raped. If so:
She did make a choice -- to have sex without ensuring that she couldn't become pregnant. Lots of decisions we make come with potential consequences with which we are stuck if they happen to come about. She's not being forced to bear a baby by anyone other than Mother Nature.
2) The uncomfortable reality is that a woman has to go through nine months of profound physical changes and pain.
Big deal. So do most people who join the military, even if they subsequently regret it. Suck it up. The consequences of some of the decisions we make cannot be retracted after the fact.
The problem with the absolutist position you are taking regarding "choice" is that it has no logical limits. Why not abortion at 7 months? Or 8? Or right before it is born. Frankly, why should any adult have any legal obligation, at all, to a child
after birth. Those of us with kids know that the easiest part is before they're born.
Those noble sentiments can be equally applied to justify a woman's fundamental right of self-determination.
What exactly does "fundamental right of self-determination" mean - other than with respect to abortion?
Women don't have the legal right to commit suicide, nor do they have a right to grow and ingest whatever drugs they'd like, even if it affects nobody other than themselves. Neither do men, for that matter. Those things are just as much "personal autonomy" or "self-determination" as anything else. Even more so, I'd argue, since they don't directly affect anyone other than themselves. So this rather grandiose sounding "fundamental right of self-determination" sounds like something invented simply for abortion.