Awareness is a nonissue as it's arguable newborn infants are unaware.
The chief difference is that newborns are capable of surviving outside of the mother. Therefore there is never an either/or question about the woman's right to her own body or the infant's right to life.

For a fetus, that dichotomy does exist.

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"Man lives in the sunlit world of that which he believes to be reality. But unseen by most is an underworld, a place that is just as real... but not as brightly lit... A DARK SIDE!"
-opening from Tales From the Darkside