**Core Concept**
Shoulder dystocia is an obstetric emergency where the anterior shoulder of the fetus cannot pass below the pubic symphysis after the delivery of the head, requiring immediate intervention to prevent complications. It is often associated with fetal macrosomia, cephalopelvic disproportion, or prolonged labor.

**Why the Correct Answer is Right**
The next measure in managing shoulder dystocia is to perform a McRoberts maneuver, which involves hyperflexing the mother's legs tightly to her abdomen to help widen the pelvis and facilitate the delivery of the baby's shoulders. This maneuver can help to relax the pelvic muscles and increase the diameter of the pelvic outlet. The McRoberts maneuver is often the first step in managing shoulder dystocia, as it can resolve the issue in many cases.

**Why Each Wrong Option is Incorrect**
**Option A:** Internal rotation of the fetal shoulders is not a recommended initial step in managing shoulder dystocia, as it may exacerbate the situation and make it more difficult to deliver the baby.

**Option B:** Use of forceps to assist with delivery is not typically recommended in shoulder dystocia, as it can increase the risk of complications and injuries to both the mother and the baby.

**Option C:** Episiotomy is not a recommended treatment for shoulder dystocia, as it may not address the underlying issue and can increase the risk of severe perineal trauma.

**Clinical Pearl / High-Yield Fact**
In cases of shoulder dystocia, it is essential to remember the "4 Ps" of management: Push, Pressure, Pivoting, and Painless delivery (using a vacuum extractor or forceps).

**Correct Answer: C. Episiotomy is not a recommended treatment for shoulder dystocia, as it may not address the underlying issue and can increase the risk of severe perineal trauma.