I agree with you, particularly that the male should be able to prevent the abortion of his unborn child if that's his belief system. I'm pro-choice, but both partners should agree. Anything less is morally reprehensible to me.
However, this is all a known danger, so men should be as wary today as women were in the 50s when deciding to round the final base. Could be costly! Could be long term! So don't pick women to have sex with whom you don't trust or like or from whose kitchens you wouldn't accept a drink of water because you're repulsed by their low standards.