Condition | Reference |
Prolonged rupture of the membranes | [49] |
Excessive uterine stimulation | [87] |
Pushing without descent | [14] |
Dysfunctional labor patterns | [15] |
Malpositions (esp. OP, asynclitism) | [58] |
Operative vaginal delivery (esp. from midcavity) | [1] [14] |
Large head circumference | [12] |