When my daughter first became hypothyroid following the birth of her second
baby, milk supply was not a part of the picture.  The baby  was fat!  She
also had no problem nursing baby #3, although they fiddled with her dose a
lot throughout her pg and post partum.  She still tends to need more
adjustments to her dose than my son with hypothyroidism.  (No his wasn't
post partum!)  Sincerely, Pat in SNJ