Why can't a women with uterus cancer get pregnant? Because there's not enough 'womb'.
What drives you to make cancer jokes about pregnant women?
I just want to say women can't get pregnant if they are sick and that is the case with women with uterus cancer.
Cancer is a very destructive disease and the women who have ovarian cancer, like the one in your joke, have gone through real trauma. Your jokes diminish them and their experiences. Don't make fun of them.