Problems with the 4 P's: Powers (expulsive forces – hypertonic uterine dysfunction, hypotonic uterine dysfunction, precipitate labor), Passenger (presentation, position, and fetal development – breech/shoulder dystocia, cord prolapse, macrosomia), Passage (the bony pelvis or birth canal – pelvic contraction, obstructions in maternal birth canal), and Psyche (client's psychological status)