> Does a pregnant woman somehow magically lose rights once she becomes pregnant? If the answer is yes, pregnant women do lose rights, then how much?
Nobody is losing rights. Nobody has the right to end the life of another barring cases like self-defense.
The mother made a choice (ignoring cases of rape) to have sex which could, even with contraceptives, lead to the outcome pregnancy.
> What weight do you put on the rights of a hypothetical person-to-be compared to a fully alive not at all hypothetical pregnant woman?
IMO, both parties deserve to live. If a fetus threatens the mother it should be terminated for her health. If the fetus doesn't, then the mother shouldn't (morally) have an abortion.
> The answer is the pregnant woman. She is the one who deserves to live, every time, full stop.
You're missing the point of my question about "who deserves to live". Should we encourage abortions for single mothers because their child might not have a happy life? Should we abort fetuses who have some disability? I'm sure that any of those individuals, once born, would prefer to live regardless of circumstance.