Final answer:
If the McRoberts Maneuver fails to alleviate shoulder dystocia during childbirth, other measures, including different maneuvers and possibly an emergency cesarean section, must be performed by healthcare providers.
Step-by-step explanation:
If the McRoberts Maneuver does not work during childbirth, healthcare providers typically progress to other obstetric maneuvers to resolve the situation, known as shoulder dystocia. The next steps often include performing suprapubic pressure, the Rubin maneuver, or the Woods screw maneuver. If these maneuvers also fail, more invasive procedures such as delivering the posterior arm or performing a Zavanelli maneuver may be necessary. In the most difficult cases, an emergency cesarean section could be required. It is critical that these steps are performed by experienced healthcare professionals to minimize the risk of injury to both the mother and the baby.