The study had to be interrupted because of an increased incidence of maternal nausea and vomiting, in the group that received fentanyl 53% vs.18%; p = 0.004.
El estudio tuvo que ser suspendido por un aumento en la incidencia de náuseas y vómitos maternos en el grupo que usó fentanilo 53% vs.18%; p = 0,004.