What is the difference between anterior and posterior uterine positions and how to distinguish them

The anterior position of the uterus is that the uterine body tilts forward, the cervical position is relatively low, and it is easier to conceive; the posterior position of the uterus is that the uterine body tilts backward, the position of the cervix is upturned, and it is not very easy to conceive; but the anterior position of the uterus and the posterior position of the uterus are normal uterine positions.