Rethinking placental transfusion and cord clamping issues

Area of Science:

• Neonatal Medicine
• Pediatric Nutrition
• Obstetrics

Background:

• Delayed cord clamping (DCC) facilitates placental transfusion, increasing infant blood volume by ~30% and providing essential iron.
• Gravity and skin-to-skin contact influence the extent of placental transfusion.
• Current recommendations for DCC duration may be shorter than optimal for maximizing benefits.

Purpose of the Study:

• To review the evidence supporting delayed umbilical cord clamping (DCC) in term and preterm infants.
• To address concerns regarding potential adverse effects of DCC, such as hyperbilirubinemia and polycythemia.
• To highlight the critical role of iron stores in early infancy for neurodevelopment.

Main Methods:

• Review of recent randomized controlled trials (RCTs) on DCC.
• Analysis of physiological mechanisms of placental transfusion.
• Evaluation of existing research on the impact of iron deficiency in infancy.

Main Results:

• DCC substantively increases iron stores in early infancy, mitigating risks of irreversible neurodevelopmental impacts.
• RCTs demonstrate benefits of DCC for both term and preterm infants.
• Evidence does not support claims that DCC causes hyperbilirubinemia or symptomatic polycythemia.

Conclusions:

• Delayed umbilical cord clamping is a beneficial practice for neonates, enhancing iron status and supporting neurodevelopment.
• Concerns about adverse effects of DCC are largely unsupported by current research.
• Standardizing DCC practices across birth settings requires interprofessional collaboration.