The terms .............and............. are interchangeable.
Fetus and child, however, are not.
For no apparent reason.
There are no unborn children, there are only fetuses.
They live at the behest of their mothers.
That they live is the first point.
That their mothers have the right to kill them is the debatable point.
A woman is with child , if she desires a baby.
She is hosting a parasitic fetus if her feelings are different.
I am not the first to notice this example of illogic , there is a comic titled "With Fetus" that is remarkably astute even though I disagree with it often.
The protagonist of the comic is a doctor and abortionist who does not have the heart to kill her own fetus when she has an unplanned pregnancy.
The author must be moving down a checklist, he is hitting every aspect of the abortion controversy .
Not always in good taste.
http://www.withfetus.com/20120402comic.php