Vitamin K Prophylaxis and Deficiency Management in Newborns

Vitamin K is vital for the synthesis of hepatic clotting factors II, VII, IX and X, and its paucity in the neonatal period predisposes to vitamin K deficiency bleeding (VKDB). Newborns are at particular risk due to limited placental transfer, low levels in colostrum and immature gut flora, especially when exclusively breastfed or premature. Prophylactic administration of phylloquinone at birth—either by intramuscular injection or oral dosing—remains the cornerstone of VKDB prevention, with global guidelines advocating universal coverage. Intramuscular delivery achieves sustained hepatic stores, whereas oral regimens depend on adherence and repeated dosing, yielding variable efficacy. Preterm infants present additional challenges, requiring tailored enteral or parenteral supplementation and fortification strategies to manage cumulative intake without overexposure. Diagnosis and monitoring of deficiency employ surrogate markers such as undercarboxylated prothrombin and functional coagulation assays, guiding postnatal management. Recent consensus recommendations underscore harmonised dosing protocols for term and preterm neonates, and emerging research addresses barriers to prophylaxis in low-resource settings. A comprehensive understanding of the pharmacokinetics, risk factors and practical regimes is essential to mitigate both early and late VKDB, optimise neonatal outcomes and inform policy on vitamin K administration.

Research from Nature Portfolio

Recent investigations have utilised neonatal PIVKA-II levels to quantify functional vitamin K status at birth, revealing that nearly half of term infants and a third of preterm infants exhibit biochemical signs of deficiency. Gestational maturity shows a modest inverse relationship with PIVKA-II concentrations, and routine postnatal prophylaxis significantly lowers markers within five days. A comprehensive meta-analysis of antenatal phylloquinone supplementation has demonstrated dose-dependent increases in maternal and breast milk vitamin K levels, yet yields inconclusive evidence for reductions in clinical bleeding outcomes, highlighting the need for higher-quality trials to define optimal maternal dosing protocols.

Vitamin K Prophylaxis and Deficiency Management in Newborns publication trend

The graph below shows the total number of articles in vitamin k prophylaxis and deficiency management in newborns across all publications each year (not limited to Nature Index journals).

Technical terms

Phylloquinone (vitamin K1): The primary dietary form of vitamin K required for γ-carboxylation of clotting factors in the liver.

Vitamin K Deficiency Bleeding (VKDB): Haemorrhagic disorder in neonates resulting from insufficient vitamin K–dependent clotting factor activity.

Protein Induced by Vitamin K Absence or Antagonist-II (PIVKA-II): Undercarboxylated prothrombin serving as a biochemical marker of vitamin K insufficiency.

Prophylaxis: Preventive administration of vitamin K to newborns to avert deficiency-related bleeding.

Hepaplastin Test (HPT): A coagulation assay sensitive to vitamin K–dependent factors used to screen neonatal vitamin K status.

References

1. Late-onset vitamin K deficiency bleeding in an extremely preterm infant fed an exclusively human milk–based diet. Journal of Thrombosis and Haemostasis (2023).
2. Range of protein induced by vitamin K absence or antagonist-II levels in neonates at birth. Scientific Reports (2024).
3. Vitamin K Deficiency Bleeding in Infancy. Nutrients (2020).
4. Vitamin K supplementation during pregnancy for improving outcomes: a systematic review and meta-analysis. Scientific Reports (2018).
5. Vitamin K prophylaxis in newborns. BMC Pediatrics (2021).
6. Current perspectives and practices of newborn vitamin K administration in low and middle income countries. Research and Reports in Neonatology (2018).
7. Total and Differential Phylloquinone (Vitamin K1) Intakes of Preterm Infants from All Sources during the Neonatal Period. Nutrients (2015).
8. Belgian Consensus Recommendations to Prevent Vitamin K Deficiency Bleeding in the Term and Preterm Infant. Nutrients (2021).
9. Efficacy of the Triple-Dose Prophylactic Vitamin K Regimen in Healthy Neonates and Evaluation of the Utility of Vitamin K Deficiency Screening. Cureus (2024).