The thought sounds great but it's a lot more complicated than donating a uterus. Hormones are a huge issue. Without hormones being excreted at the right amount and the right time could result in miscarriage, and it's not easy to keep track of medications for something that the capable body can easily do on its own (just based on what I've learned in pharmaceutics.) Or other mishaps could happen. I'm sure people have thought about it, about donating uterus to people who want it, but the process of creating life is going to be insanely hard. But maybe someday it'll be a reality, who knows? :)