...because demanding that a rape victim must carry her rapist's child to term is CREEPY.
She must: suffer morning sickness; have ultrasounds and perhaps amniocentesis; and even buy a maternity wardrobe, *at her own expense*. All of that just because she was raped.
You're asking a great deal of such a woman, especially if she is pro-choice herself and if she doesn't even belong to any religion. So yes, you would be forcing a pro-choice atheist rape victim to adhere to your own moral code.
To me, that's involuntary servitude. It's creepy, reminiscent of the movie "Rosemary's Baby."
Ann Coulter is right: No law, no Constitutional Amendment, will ever force a rape victim to carry the rapist's child to term.