Chronobiology of parturients receiving neuraxial labour analgesia with ropivacaine and fentanyl: a prospective cohort study

Parturients with labour onset and neuraxial analgesia request in the evening and night experienced higher pain scores. However, no significant differences in the incidence of breakthrough pain or the quality of analgesia were observed with the provision of commonly used concentrations of ropivacaine with fentanyl via continuous epidural infusion.