At the risk of playing devils advocate, and perhaps the authors didnt mean quite this, but there is definately an ethical point here - and the people who have to take a look at themselves as a result of that point being made are those on the pro-choice side of the argument.
After all, most of the reasons cited as to why women have a right to choose are not fundamentally affected by whether the child is a fetus or a newborn baby; there is very little actual evidence (in terms of understanding, mental ability, evidence of reasoning etc) that could be used to ethically separate a child that it is legal to kill from one that isnt. Why is it that most Western countries allow one child to be killed and not another?
