Introduction
Epidural labor analgesia is the most effective and widely used labor analgesia technique in clinical practice.1 However, labor breakthrough pain of varying degrees can still occur as delivery progresses with an incidence as high as…

Epidural labor analgesia is the most effective and widely used labor analgesia technique in clinical practice.1 However, labor breakthrough pain of varying degrees can still occur as delivery progresses with an incidence as high as…