For me, Francis Beckwith is the one to read on the scandalous, horrendously evil debate on aborting persons after they are born.
See Beckwith's "Potential Persons in the 'After-Birth Abortion Article'."
"The fetus, then, is not a potential person. It is what it is: a being with a personal nature, and for that reason, it has essential properties that include capacities for personal expression, rational thought, and moral agency. The maturation of these capacities are perfections of its nature, and thus, contrary to what Giubilini and Minerva claim, the human fetus can be wronged even before it can know it has been wronged."