I still have no actual knowledge, but I did some googling. Google suggests that a healthy uterus has the ability to move around, but it has a preferred position. So generally it will be in the same, but can flip flop. Folks who have scar tissue from surgery, endo, etc - theirs can't move - but if no issues then it has the ability to move.
That is google obtained, so take it with a large grain of salt!