DOI: 10.1001/jamapediatrics.2026.5794 ISSN: 2168-6203
Vitamin K Deficiency and Associated Bleeding in Infants
Elizabeth R. Wolf, Evan French, Darya Shokouhi Niaki, Steven H. WoolfThis cross-sectional study examines changes in intramuscular vitamin K receipt and incidence of vitamin K deficiency and vitamin K–deficient bleeding among US infants between 2017 and 2025.