[Voice in your head]

"Try it this way: Assuming that there is a situation in which continuing a pregnancy *might* kill the mother, what could be the possible objection to *killing the baby* within the womb? Is there no such thing as self-defense, *whereby a mother reduces risk to herself by killing her helpless baby*?"

If I understand your question, then the answer is "no." Self-defense against what "might" happen? My neighbor might try to kill me. Should I kill him first? Self-defense is rightfully invoked for imminent threats.

[dsc]

"If I understand your question, then the answer is "no."

Well, then, I don't see any convincing argument for allowing abortion under any circumstances.