Final answer:
The nurse will inform the client that the amniotomy is expected to increase the efficiency of contractions to facilitate labor progression.
Step-by-step explanation:
The nurse will likely relay to the client that the most likely outcome of the amniotomy (an artificial rupture of the membranes) is an increase in the efficiency of contractions. By performing the amniotomy, it is expected that labor will progress more rapidly due to stronger and more effective contractions. Amniotomy is often done in conjunction with other interventions like Pitocin infusion to enhance labor when it is not progressing normally.