In her research, Dr. Campbell-McBride discovered that nearly all of the 
mothers of autistic children have abnormal gut flora, which is 
significant because newborns inherit their gut flora from their mothers 
at the time of birth. Establishing normal gut flora in the first 20 days 
or so of life plays a crucial role in the maturation of your baby's 
immune system. Babies who develop abnormal gut flora are left with 
compromised immune systems, putting them at higher risk for suffering 
vaccine reactions.

If your baby has suboptimal gut flora, vaccines can become the 
proverbial "last straw"—the trigger that "primes" his/her immune system 
to develop chronic heath problems.

In short, there is a close connection between abnormal gut flora and 
abnormal brain development—a condition Dr. Campbell-McBride calls Gut 
and Psychology Syndrome (GAPS).The best way to prevent GAPS is for the 
mother to avoid all antibiotics and birth control pills prior to 
conception and then by breastfeeding and avoiding the use of antibiotics 
after delivering.  This is because they destroy the balance of gut 
floras and promote the growth of pathogenic bacteria.

From:http://articles.mercola.com/sites/articles/archive/2012/01/24/new-evidence-refutes-fraud-findings-in-dr-wakefield-case.aspx?e_cid=20120124_DNL_art_2

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Seriously iodine-deficient mothers bear cretins.
I suggest that brain maintenance also needs the proper gut flora, which 
depends on the gut environment created by our food choices.
The present gut environment of those who do not supplement with iodine 
includes the poison bromine, resulting in mental deficiency vividly 
described by Ben Balzer, to wit: "we are all barking mad".

William