Which factor ensures that the smallest anterior-posterior diameter of the fetal head enters the pelvis?
A) Station
B) Flexion
C) Descent
D) Engagement

Question

Quizplus · Accepted Answer

The anterior-posterior diameter of the head varies with how much it is flexed. In the most favorable situation, the head is fully flexed and the anterior-posterior diameter is the suboccipitobregmatic, averaging 9.5 cm. The station is the relationship of the fetal presenting part to the level of the ischial spine. Descent is the moving of the fetus through the birth canal. Engagement occurs when the largest diameter of the fetal presenting part has passed the pelvic outlet.

Which Factor Ensures That the Smallest Anterior-Posterior Diameter of the Fetal