## Core Concept
Shoulder dystocia is an obstetric emergency that occurs when the fetal shoulder becomes impacted against the maternal pubic bone after delivery of the head. It requires immediate and effective maneuvers to facilitate safe delivery. Various maneuvers are employed to manage this condition.

## Why the Correct Answer is Right
The McRoberts maneuver, Woods' corkscrew maneuver, and the Rubin II maneuver are all established techniques used in the management of shoulder dystocia. The McRoberts maneuver involves hyperflexion of the mother's legs tightly to her abdomen to help alleviate the impaction. Woods' corkscrew maneuver and the Rubin II maneuver involve rotation and manipulation of the fetal shoulders to facilitate delivery.

## Why Each Wrong Option is Incorrect
**Option A:** The McRoberts maneuver is indeed a first-line technique used in the management of shoulder dystocia, making it incorrect as an answer to what is not used.
**Option B:** Woods' corkscrew maneuver is another technique utilized, so it is also incorrect.
**Option C:** The Rubin II maneuver is a recognized method, which makes it incorrect as well.
**Option D:** The Kristeller maneuver, which involves pushing on the uterus to try and deliver the baby, is not a recommended or standard technique for managing shoulder dystocia and can actually cause more harm.

## Clinical Pearl / High-Yield Fact
A key point to remember is that the management of shoulder dystocia involves a sequence of maneuvers: McRoberts maneuver, followed by Woods' corkscrew maneuver, then Rubin II if necessary, and finally, if all else fails, the Zavanelli maneuver (which involves pushing the baby back into the birth canal and then performing a cesarean section).

## Correct Answer: D. Kristeller maneuver