Final answer:
The McRoberts Maneuver is a technique used to resolve shoulder dystocia by altering the mother's position to increase the pelvic diameter and facilitate delivery.
Step-by-step explanation:
When performing the McRoberts Maneuver to intervene in shoulder dystocia, practitioners increase the pelvic diameter to facilitate the delivery of the baby. This is done by having the mother flex her thighs against her abdomen sharply, thus flattening the lumbar lordosis and rotating the pelvis. This change in position can result in the baby's shoulder dislodging from behind the mother's pubic bone, allowing for a successful vaginal delivery.