Such clinical language does not necessarily lead to a pro-choice conclusion. It is morally significant, for instance, that the cell clusters and fertilized eggs in question are human cell clusters and fertilized eggs. Even fully grown adults, after all, realize less than their full human potential, are composed of cell clusters and developed from fertilized eggs. These facts tell us nothing about whether, or when, killing adults is wrong. Prohibiting abortion would certainly limit freedom.
All laws limit freedom.
Thoughtful people disagree on the appropriate scope and object of law, but arguing that abortion should be kept legal because a law against it would carry with it the sting of law merely states the obvious without addressing the underlying moral issues. Surely the authors would be properly appalled at these ideas, but they provide the reader with no standard for restricting to the fetus the principles which point to these horrific, if far-fetched, consequences. The authors are correct in saying that abortion deserves careful treatment. I thank them for their important and useful thoughts on this difficult matter.