I have no moral argument with this. The prospect that makes me ill is the rapist coming along after the birth demanding his parental rights and custody, etc. No rape victim should have to put up with that.
While I admit that is a frightening possibility, the thought of destroying human life and having to answer to it before God on Judgement Day, would be even more intimidating.
My solution to that is to make forcible rape a capitol offense. Barring that, a conviction of rape should nullify any parental rights asserted by the rapist.
I have never heard of such a thing, since the rapist is likely serving a serious prison sentence, and anyway, parental rights can be terminated by the courts.
If you know of such a case I'd be interested in hearing about it.