hemorrhagic disease of the newborn

What are the Types of HDN?

HDN is categorized into three types based on the timing of onset:
Early HDN: Occurs within the first 24 hours of life, often associated with maternal use of medications that inhibit vitamin K.
Classical HDN: Occurs between 1 to 7 days of life, typically in breastfed infants who do not receive vitamin K prophylaxis.
Late HDN: Occurs between 2 weeks to 6 months of life, primarily in exclusively breastfed infants with no vitamin K supplementation.

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