But according to you that is suffering that is "made up for" by eternal bliss. Why isn't that a great trade-off for that "life"?
Start with the ones you avoided first.
It may be good for the fetus but it's still better not to get killed in utero.
I think in many states a pregnant woman is considered being two people if she's murdered.
I haven't thought enough about your other questions to have an opinion.