Comparing the safety and effectiveness of various umbilical cord milking techniques and delayed cord clamping in full-term and preterm infants: A systematic review and meta-analysis

Amal Y. Zaman, Hammad A. Fadlalmola, Amani A. Mohammed, Huda Hassabelrasool Abedelwahed, Kawther E. Mohammed, DS Veerabhadra Swamy, Murtada M. Gabir, Mohammed D. Alshahrani, Mohammed A. Assiri, Saad A. Al-Harthi, Abdulrahman O. Altufayl, Mohammed M. Aljohani, Fathia H. Mohammed, Rasha A. Omer, Nasreldeen M. Ahmed, Asia S.M. Ahmed, Dalia A. Gaafar, Soad M.A. Alnassry, Selwa Y. Abdeldafi, Mariam Y. Elhussain, Egbal A. Almkiy

Abstract

We compare the hematocrit, hemoglobin, need for transfusion, recurrent phototherapy, serum bilirubin level, and serum ferritin at different time frames for the umbilical cord milking (UCM) and delayed cord clamping (DCC) in both full-term and preterm infants. A comprehensive search through various databases aimed to compare UCM and DCC studies until May 2nd, 2023. Cochrane and NIH tools assessed RCTs and cohorts, respectively. Meta-analysis employed Review Manager 5.4 software, calculating MD and RR with 95% CIs for continuous and dichotomous data. We included 20 studies with a total of 5189 infants. Regarding preterm infants, hematocrit level showed no significant difference between intact Umbilical Cord Milking (iUCM) compared to DCC (MD = -0.24, 95% CI [-1.11, 0.64]). Moreover, Neonatal death incidence was significantly higher with the UCM technique in comparison to DCC (RR = 1.28, 95% CI [1.01 to 1.62]). Regarding term and late preterm infants, Hematocrit level showed no significant difference between the iUCM or cUCM techniques compared to DCC (MD = 0.21, 95% CI [-1.28 to 1.69]), (MD = 0.96, 95% CI [-1.02 to 2.95]), respectively. UCM led to a higher risk of neonatal death in preterm infants compared to DCC. However, the incidence of polycythemia was lower in the UCM group. Additionally, UCM was associated with higher rates of severe IVH events. Based on these findings, DCC may be preferred due to its lower incidence of severe IVH and neonatal death. (Afr J Reprod Health 2023; 27 [11]: 99-125).

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