The commonest cause of occipitoposterior position of fetal head during labor is:
Maternal obesity
Multiparity
Deflexion of fetal head
Android pelvis
In vertex presentation when the occiput is placed posteriorly over the sacroiliac joint or directly over the sacrum. It is called as occiptoposterior position.
Causes of Occipitoposterior Position:
Most common cause of occipitoposterior position is anthropoid and android pelvis: