I’d actually never heard that before, about stress curtailing pregnancy from rape. Wouldn’t doubt it might indeed have some merit. Nonetheless, Aiken’s statement leaves an implication that a woman who actually got pregnant via rape might not be a victim of ‘legitimate rape’ (his words), and thus partly responsible for her pregnancy... which strikes me as, um, kinda sick.
Reminds me of Whoopie Goldberg’s distinction between rape and rape-rape.