Don't forget that there are exceptions.  I can't think of a reference I have seen in the last year or so. (Sorry)  However, I was once at a conference in Melbourne and both the person next to me in an activity and myself had *gained* weight while tandem breastfeeding.  I gained considerable weight during my last, non-tandem BF, lactation.  On the other hand, during pregnancy, my metabolism apparently speeds up as I can eat like a horse and *lose* weight when pregnant.
  While the literature suggests postpartum weightloss is more common than the opposite, I think there is more to be learnt than we yet know.
         Cheers,
            Virginia

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