Explanation
The **3 Ps** are Power, Passenger, and Passage. They represent the uterine forces, the fetus, and the maternal birth canal, respectively. Their interaction helps determine labour progress, success, and outcome. The other choices include relevant obstetric terms but are not the named framework. **Key takeaway:** Assess all three Ps when evaluating progress.\n\n**Glossary:** **Power**: uterine contractions; **Passenger**: fetus; **Passage**: maternal birth canal.
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