Infants recieve IgG antibodies from the mother at birth.  It is my 
understanding that they begin to dissapate at around 3 months of age.  The infant 
recieves very little IgG from breastmilk and is not producing IgG antibodies very 
well for a months.  I believe that this info can be found in:  Cunningham AS, 
Jelliffe DB, Jelliffe EFP. Breastfeeding and health in the 1980's: a global 
epidemiologic review. J Pediatr 1991;118:659-66



In a message dated 12/20/2005 9:10:18 PM Pacific Standard Time, 
[log in to unmask] writes:
Even though formula-fed babies do not receive infection-fighting antibodies 
from the breast milk, they still will have received four to six month supplies 
of these antibodies through the maternal bloodstream prior to delivery. 
Remember also that the majority of breastfeeding infants end up on a combination of 
breast and formula-feedings before their first birthday.
   
   

Christine Betzold NP IBCLC MSN

www.theBFclinic.com

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