Many women who have a retroverted or tilted uterus use menstrual cups without any problems. Of course it always depends on how drastically your uterus is tilted, since every women body is different. But for many women a Ruby Cup fits just fine. Maybe you have to work a little with the angle while inserting it, so that it covers your cervix and sits right without leaking – but after a few tries (which any new menstrual cup-user has to face), you will definitely figure out how it should be positioned so it fits best for you.