What part of “less likely” don't you understand. Of course it happens. A woman biting and kicking and attempting to end an encounter is bound to get pregnant much less often than one have a loving consensual encounter. It is a stupid argument no doubt and one case is tragic for both the victims of the crime. If there are 1.6 million abortions yearly and all 32000 rape pregnancies are aborted then the rate is about 1.5% of abortions are rape related. Leaving out statutory rape and false claims though unknown would reduce this.
A woman biting and kicking and attempting to end an encounter is bound to get pregnant much less often than one have a loving consensual encounter.
Based on what? The only legitimate argument is that the men are less likely to successfully ejaculate in the violent encounter, which as more to do with the man than some magical vagina defense.
So i'll ask you as well - if you're on a jury in a rape case and the Defense made the argument that because the victim is pregant, that's enough reasonable doubt to suggest the woman is lying and the sex was consensual - do you at least consider that evidence? Would you bring that up in the jury room as evidence supporting the view that the defendant should be acquitted?