ROP is a professional expression for fetal position, and there are some other professional expressions for fetal position, ROP position sometimes changes after delivery, but if the fetus does not turn to the occipital position after the opening of the uterus is nearly complete, it is called persistent occipital posterior position, and the chance of obstructed labor is increased. This is a kind of fetal position of difficult cephalic delivery. If ROP is found after labor, you need to observe it closely and communicate with your doctor in time to prevent obstructed labor in head position.