This is a self-contradicting statement. They were certainly in a grievous, pitiable situation, the moreso because they discovered, under difficult circumstances, that they were actually pro-abortion.
Other mothers and fathers, in the same circumstances, decided not to slay the unfortunate child. They are the ones who are actually "anti-abortion."
An anencephalic child will shortly die. If he or she lives but briefly and breathes his last in his mother's arms, it is heartbreaking but it is not a crime. To kill him or her intentionally is something else. It's a denial of the child's humanity, a refusal of parental love and, frankly, homicide.
"Do you believe that in vitro fertilization ought to also be illegal?"
Yes. Thank you for asking. It makes the conceived child, first, a lab experiment and then, a kind of living property in a commercial transaction, subject to culling and disposal if not up to specifications, like a substandard lab rat.
This falls short of the respect which we owe to a human child.
Children have a right to be conceived in the marital embrace and accepted unconditionally. Anything short of that is wrongful from the point of view of the child's own dignity as a person, not a thing.
That says it all, with beauty.
I’m afraid I’ll need a scripture to back that up. Not that you are necessarily wrong, but I’d like to hear God’s opinion on invitro fertilization.