Personal experience only here, repeated bouts of mastitis, plugged ducts 
with 4th baby.  Yes, I would notice a supply decrease.  I figured it was 
brain telling breast, slow down, something is going on down there. The flip 
side is decreased supply led to more frequent nursing by baby boy and supply 
usually picked back up to normal by time breast felt better.  After the 
first bout or 2 I didn't use antibiotics.  Just heat, rest and frequent 
emptying - straight from WABF in 1966. :-)

Now I can't quote you on anyone else's experiences. Not sure if there is any 
research on topic either.  Pat in SNJ 

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