I also would want the rapist put to death. Rape is a crime guilty of death. Have the baby alive and run a DNA test to have 100 percent genetic proof of the rapist, and then execute him. He'll never rape again.
That could get messy. What if he and his family pleaded for mercy in court? And the victim decided she'd rather forgive him than see him ab--- er, executed. In effect, it would often be that rapists were put to death on the say-so of the victim.
Now, let's take it another step. What if she'd like to forgive him and not see him put to death, but there's a good chance, her lawyer says, that if she forgives him, he'll take her to court and try to get visitation rights or even custody? Who knows if that affects her decision whether to recommend clemency or not?
For that matter, what about the women who might take advantage of a law that called for executing rapists? Maybe some men would be accused of rape because they were, you know, inconvenient.
It could get real messy.