OBSintermediate
Arrange the anatomical divisions of the true pelvis in the order that the fetal head passes through them during labor, from superior to inferior.
Answer
Pelvic inlet, Mid-pelvis, Pelvic outlet
Explanation
The fetal presenting part progresses through the pelvic inlet, mid-cavity, and outlet. Adequacy at each level matters; an issue at any level can impede progress. **Key takeaway:** Consider the entire pelvic canal rather than a single dimension.\n\n**Glossary:** **Mid-cavity**: the middle portion of the bony pelvis.
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