In those instances, you taking organs which you need to live and giving them to someone else. In most cases, a pregnancy is not going to take any of these organs away from the mother and change their function. Her blood and organs will continue working normally

So in a case of things with no long term consequence on the body, it's fine? I can take your bone marrow or your blood if I need it to survive and there is no alternative, even if you object? After all, your choices caused me to need it in my hypothetical, shouldn't you be held responsible for saving my life?

Anyhow childbirth can also have permanent consequences for the mother's body. It's far from certain that the body will function normally postpartum.

partaking in intercourse the mother participated in an action that she knew could result in a child.

Let me make a bit of a stretch for a hypothetical; if the woman WASN'T aware that pregnancy was a possibility, does that excuse her from responsibility and justify an abortion? If it doesn't, let's not pretend that her personal accountability is relevant to your position.

She has a parental responsibility to that child that results from those actions

I think is probably where we diverge most strongly, and the basis for most of my opinions on the subject. I think our responsibility comes first to our species, and secondly to the individual. It's extremely detrimental to force birth of unwanted children, to the outlook of the child, to the outlook of the parent, and to society in general. Overpopulation is quite literally driving the forces that are destroying this planet and if someone doesn't want a child they shouldn't be forced to have it. If we lived in a stable post-scarcity society I'd probably agree with you.