Wait a minute, he never said that rape wasn't horrific. All he said was he is against abortion, even in the cases of rape. He said that the baby shouldn't have to suffer because of the circumstances of the conception. That is all.
As a conservative, fundamentalist Christian he believed the propaganda from those sources that say that experiencing traumatic stress hampers implantation or can cause spontaneous miscarriage. According to the study Calimari cited, 5% of rapes result in a pregnancy. Of those, about 50% of the women opt to continue the pregnancy. Apparently, Akin thought the percentage was lower.
He knows better now and has apologized.
When he used the word "legitimate" he was trying to differentiate between stranger rape and statutory rape (some of which is illegal but considered consensual).
Can we move on now?