Which factor ensures that the smallest anterior-posterior diameter of the fetal head enters the pelvis?
a. Descent
b. Engagement
c. Flexion
d. Station
C
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A Descent is the moving of the fetus through the birth canal.
B Engagement occurs when the largest diameter of the fetal presenting part has
passed the pelvic inlet.
C Flexion of the fetal head allows the smallest head diameters pass through the
pelvis.
D The station is the relationship of the fetal presenting part to the level of the
ischial spines.
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