I just had a colleague who also happens to be an MD say out loud in front of several nurses that breastfeeding only makes a difference for the first 2 months of life, after that the newborn has a mature immune system and that after 2 months it makes no difference whether you formula feed or breastfeed or not.....
  ok, 
  I am proud of myself in that I very respectfully said to him that that was simply not true.  Frst of all, all the research states that breastfeeding makes a difference past 2 months and that I disagreed that the immune system of a newborn was "mature" at 2 months of life.
   
  He said there was a study by the AAP that stated this.  I jokingly said it must have been funded by Ross Laboratories(this is an MD that we joke with a lot)
   
  I said I could get him other research that demonstrated otherwise
   
  I have been googling and unfortunately I am not coming up with a whole lot.  Thank Gawd I have one study that is published in Pediatrics, th AAPs journal that clearly states the infant immune system is not mature as far as B-cell response until aprox 2 years of age.
   
  Interestingly, I am finding that by around 3months of life the infant has aprox adult level functioning of T-cells, producing IGA at adult levels.  
   
  Any help with studies regarding infant immune system development would help me a lot as I am working extra to pay off bills and can't google all night long!
   
  Thank you, 
   
  Mary Herrington, RN, IBCLC
  Lactation, Memorial Hermann Northwest
  Labor & Delivery, Memorial Hermann The Woodlands
  

 

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