Does occiput posterior position in the second stage of labour increase the operative delivery rate?

Objectives: To assess the impact of occipito-posterior position in the second stage of labour on operative delivery.

Methods: Double-blinded prospective cohort study of ultrasound determined occiput-posterior position during the second stage of labour compared with occiput-anterior position. The primary outcome was operative (caesarean section, forceps or vacuum) delivery.