Related Experiment Video
Updated: Dec 26, 2025

Megakaryocyte Differentiation and Platelet Formation from Human Cord Blood-derived CD34+ Cells
Published on: December 27, 2017
Vitamin K Deficiency Bleeding in Infancy
Shunsuke Araki1, Akira Shirahata2
1Department of Pediatrics, School of Medicine, University of Occupational and Environmental Health, Kitakyushu 807-8555, Japan.
Insights
Vitamin K deficiency bleeding (VKDB) in infants is a serious risk, especially with exclusive breastfeeding. Prophylactic vitamin K, particularly oral administration, is crucial for preventing this potentially life-threatening condition in newborns.
Area of Science:
- Pediatrics
- Neonatology
- Hematology
Background:
- Vitamin K is vital for synthesizing crucial coagulation factors.
- Infants are susceptible to vitamin K deficiency due to factors like poor placental transfer, low breast milk content, and immature gut flora.
- Vitamin K deficiency bleeding (VKDB) presents in early, classic, or late forms, with late-onset VKDB posing significant life-threatening risks.
Purpose of the Study:
- To emphasize the necessity of vitamin K prophylaxis for all infants.
- To discuss the association between exclusive breastfeeding, cholestasis, and late-onset VKDB.
- To evaluate the shift towards oral vitamin K administration over intramuscular injections.
Main Methods:
- Review of epidemiological studies on vitamin K prophylaxis strategies.
- Analysis of the effectiveness of oral versus intramuscular vitamin K administration.
- Assessment of factors influencing the success of oral prophylaxis, including regimen and compliance.
Main Results:
- Intramuscular vitamin K injections effectively reduce the incidence of all VKDB types.
- Oral vitamin K administration is increasingly favored for its ease, safety, and cost-effectiveness.
- Epidemiological data suggest oral vitamin K is effective, but success hinges on specific protocols and parental adherence.
Conclusions:
- Vitamin K prophylaxis is essential for all newborns to prevent potentially fatal VKDB.
- Oral vitamin K prophylaxis shows promise but requires optimized regimens and high parental compliance.
- Further research and national surveillance are needed to determine the optimal oral vitamin K prophylaxis strategy for term and preterm infants.
Abstract:
Vitamin K is essential for the synthesis of few coagulation factors. Infants can easily develop vitamin K deficiency owing to poor placental transfer, low vitamin K content in breast milk, and poor intestinal absorption due to immature gut flora and malabsorption. Vitamin K deficiency bleeding (VKDB) in infancy is classified according to the time of presentation: early (within 24 h), classic (within 1 week after birth), and late (between 2 week and 6 months of age). VKDB in infancy, particularly late-onset VKDB, can be life-threatening. Therefore, all infants, including newborn infants, should receive vitamin K prophylaxis. Exclusive breastfeeding and cholestasis are closely associated with this deficiency and result in late-onset VKDB. Intramuscular prophylactic injections reduce the incidence of early-onset, classic, and late-onset VKDB. However, the prophylaxis strategy has recently been inclined toward oral administration because it is easier, safer, and cheaper to administer than intramuscular injection. Several epidemiological studies have shown that vitamin K oral administration is effective in the prevention of VKDB in infancy; however, the success of oral prophylaxis depends on the protocol regimen and parent compliance. Further national surveillance and studies are warranted to reveal the optimal prophylaxis regimen in term and preterm infants.
Related Concept Videos
Disorders of Hemostasis
Thromboembolic Disorders
Two factors primarily cause thromboembolic conditions.
Vitamins
Anticoagulant Drugs: Vitamin K Antagonists and Direct Oral Anticoagulants
Warfarin, a prominent vitamin K antagonist family member, exerts its effect by inhibiting the enzyme VKORC1 (vitamin K epoxide reductase complex 1). By hindering this enzyme, warfarin...
Pharmacokinetics in Pediatric Patients: Overview and Drug Absorption
Venous Thrombosis IV: Nursing Management
Role of Vitamins in Maintaining Bone Health
Vitamin A
Vitamin A is involved in the process of bone remodeling. Retinoic acid, the active metabolite of Vitamin A, has nuclear receptors in osteoblasts and osteoclasts, which are involved in bone remodeling.
Vitamin B12
Vitamin B12 acts as a cofactor during the formation of osteoblast-related proteins, such as osteocalcin. Vitamin B12 plays a role...

