hi, i think it's a question that only a person in the situation can answer, as it will be different for everyone, depending on their priorities. It might be an interesting theoretical debate, but i would hope that noone has had the experience or will have the experience, and cannot contribute anyting to the debate. You cannot have chemotherapy or radiotherapy while you are pregnant without risking the life of the foetus, so most women in the situation will either be induced early so they can start treatment, or if in the early stages, have an abortion