In the assessment of prolonged labor, how does the 3-P framework classify the causes of poor progress, and how does this classification determine appropriate clinical management?

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The 3-P framework classifies causes into Power (inadequate or hypocontractile uterine contractions), Passenger (fetal malposition, malpresentation, or macrosomia), and Passage (maternal pelvic insufficiency or cephalopelvic disproportion). Clinical management is targeted directly at the underlying factor: Power deficiencies are managed with labor augmentation (such as amniotomy or intravenous oxytocin), whereas mechanical obstructions involving Passenger or Passage typically require operative delivery (instrumental delivery or caesarean section).. The identified causes map onto the 3 Ps: ineffective contractions concern Power; cephalopelvic disproportion concerns the relationship between Passenger and Passage; and malposition or malpresentation concerns Passenger. The slides list augmentation, instrumental delivery, and caesarean section as options, selected according to the cause and clinical situation. **Key takeaway:** Treat the cause of abnormal progress, not merely the observation of delay.

**Glossary:** **Cephalopelvic disproportion**: mismatch between the fetal head and maternal pelvis; **augmentation**: strengthening labour after it has begun.

In the assessment of prolonged labor, how does the 3-P framework classify the causes of poor progress, and how does this classification determine appropriate clinical management?

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