The most extensive data regarding the effects of uterine RT are for pre and peri-menarchal girls. Although women who had pelvic RT as children can often become pregnant if the ovaries are still functional, even doses as low as 10-20 Gy cause atrophic development of the uterus with decreased uterine ...

I have come across this situation in young patients with vulvar cancer where pelvic nodes need to be treated. Since the central organs are not at risk, I have spared the ovaries (by oopheropexy) and the uterus as much as possible from RT, and have had those patients continue normal uterine function.