You're splitting hairs. It does you no credit. Akin claimed that in the case of "legitimate rape," the female body "has a way to shut that whole thing down." This is a FALSE STATEMENT! Period! It does NOT! It may be that under less violent conditions, pregnancy may be more LIKELY, but if a sperm cell reaches the ovum the right interval after ovulation, and the embryo implants in the uterine wall, then she's going to have a baby, and it doesn't matter if the sperm cell came from a rapist or not, and her body has no way to spontaneously or voluntarily abort this.
As I said, republicans only bring contempt on themselves when they spout pseudoscience.