Cammy,
I have ovarian cancer and I had a complete hysterectomy, but I am 55, and had already gone through Menopause. I have heard that there are chemo drugs that wouldn't affect her fertility, if that's a concern. I had gone through chemo, and it wasn't bad, although I have heard horror stories, but they're better than the alternatives(death). So if she would take your advice, and you would take the advice of a well meaning stranger, I think she should do chemo since she is having recurring tumors.
Good luck to your daughter.
Peggy