Haemorrhagic diseases of the newborn.

In 1997, the Canadian Paediatric Society revised its recommendations on the administration of vitamin K to newborn babies to prevent hemorrhagic disease of the newborn (HDNB). Although the previous guideline indicated that oral vitamin K prophylaxis was equivalent to intramuscular (IM), epidemiologic evidence suggested an increased relative risk of HDNB by a factor of 6.15 (the current guideline contains a typographical error, identifying this risk as increased by 8.15).