In a few words Robert P. George gets to the heart of the issue in his brief post "In Gosnell Case, Abortion on Trial." He writes:
Something as morally arbitrary as a human being’s location—his or her
being in or out of the womb—cannot determine whether killing him or her
is an unconscionable act of premeditated homicide or the exercise of a
fundamental liberty. Yet something like that is the prevailing state of
American law under Roe v. Wade and Doe v. Bolton. Its incoherence and
indefensibility have been laid bare by the prosecution of Dr. Gosnell.
Whatever now happens to him, it will no longer be possible to pretend
that abortion and infanticide are radically different acts or practices.