• Walid El-Naggar, David Simpson, Arif Hussain, Anthony Armson, Linda Dodds, Andrew Warren, Robin Whyte, and Douglas McMillan.
• Division of Neonatal-Perinatal Medicine, Department of Pediatrics, Dalhousie University, Halifax, Nova Scotia, Canada.
• Arch. Dis. Child. Fetal Neonatal Ed. 2019 Mar 1; 104 (2): F145-F150.

ObjectiveTo investigate whether umbilical cord milking (UCM) at birth improves systemic blood flow and short-term outcomes, as compared with immediate cord clamping (ICC).DesignRandomised clinical trial.SettingSingle tertiary care centre.PatientsInfants born to eligible women presenting in preterm labour between 24 and 31 weeks' gestation.InterventionsUCM three times at birth or ICC.Outcome MeasuresPrimary outcome included systemic blood flow as represented by echo-derived superior vena cava(SVC) flow at 4-6 hours after birth. The echocardiographer and interpreter were blinded to the randomisation. Secondary outcomes included cardiac output, neonatal morbidities and mortality. Analysis was by intention to treat.ResultsA total of 73 infants were randomised (37 to UCM and 36 to ICC). Mean (SD) gestational age was 27 (2) weeks and mean (SD) birth weight was 1040 (283) g. Haemoglobin on admission was higher in the UCM than in the ICC group (16.1 vs 15.0 g/L), p=0.049 (mean difference 1.1, 95% CI 0.003 to 2.2). No statistically significant differences were found between groups in SVC flow at 4-6 hours (88.9±37.8 and 107.3±60.1 mL/kg/min), p=0.13 (mean difference -18.4, 95% CI -41.7 to 5.0 mL/kg/min) or at 10-12 hours of age (102.5±41.8 and 90.6±28.4 mL/kg/min), p=0.17 (mean difference 12.0, 95% CI -4.7 to 28.7 mL/kg/min), cardiac output or neonatal morbidities.ConclusionsCord milking was not shown to improve functional cardiac outcomes, neonatal morbidity or mortality. More research is needed before routine cord milking can be recommended for very preterm infants.Trial RegistrationNCT01487187.© Article author(s) (or their employer(s) unless otherwise stated in the text of the article) 2019. All rights reserved. No commercial use is permitted unless otherwise expressly granted.

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