Transient brachial plexus palsy (3.0 to 16.8%)
Clavicular fracture (1.7 to 9.5%)
Humerus fracture (0.1 to 4.2%)
Permanent brachial plexus palsy (0.5 to 1.6%)
Hypoxic-ischemic encephalopathy (0.3%)
Death (0 to 0.35%)
Fourth degree perineal lacerations
Post-partum hemorrhage
Shoulder dystocia
Emergent delivery
Cervical injury 
Umbilical cord prolapse
Infant scalp hematoma
Breech delivery
Preterm labor
Perimortem cesarean delivery