OXT and Hyponatremia: Maternal hyponatraemia can also be reflected in the fetus, and some studies have reported increased incidence of respiratory distress and hyperbilirubinaemia in hyponatraemic infants.4,5 In recognition of these studies, changes of obstetric practice were proposed, including administration of oxytocin in sodium-containing fluids.1,6 Many delivery suites restrict oral intake during labour as a preventive measure, believed to reduce the risk of pulmonary aspiration should general anaesthesia become necessary.