2.But a consciousness doesn't exist in either. One common argument against abortion I see is "how would you feel if you were aborted. But I didn't exist as a person until around the time my body left the womb. So aborting the fetus that became me would have been preventing me from coming into existence in the first place, not killing me. Having contraceptives at the moment of said fetus's conception or not having done it in the first place would have had a basically identical effect on my consciousness.
That does not follow. Consciousness doesn't magically show up during birth, regardless of gestation. By your logic at minimum, killing preemies must be morally acceptable, and killing older babies is likely ok as well.
