Question

The least common cause of long, difficult, or abnormal labor (dystocia) is:

a. Midplane contracture of the pelvis.
b. Compromised bearing-down efforts as a result of pain medication.
c. Disproportion of the pelvis.
d. Low-lying placenta.

Answer 1

Midplane contracture of the pelvis is the least common cause of dystocia, which refers to long, difficult, or abnormal labor. Other more common causes include compromised bearing-down efforts, disproportion of the pelvis, and low-lying placenta.

Step-by-step explanation:

Least Common Cause of Dystocia

The least common cause of long, difficult, or abnormal labor (dystocia) is midplane contracture of the pelvis. Dystocia refers to any difficulty or complication during labor and delivery. Midplane contracture occurs when the pelvic bones narrow in the midline, obstructing the passage of the baby through the birth canal.

Other causes of dystocia include compromised bearing-down efforts as a result of pain medication, disproportion of the pelvis, and low-lying placenta, but these are more common than midplane contracture.