Pearl  you write

>>>When mother and baby have different blood types and baby's bilirubin is
elevated when breastfeeding, is breastfeeding contraindicated?  The baby's
bili went up to 26 , dropped down to 8 when baby was taken off the breast.
Mother is O-, baby is A+.<<

Dr. Larry Gartner is the expert on jaundice but I'll give it a stab.
What was the coombs?  A positive coombs test indicates an ABO
incompatibility. If the coombs was strongly positive then the jaundice was a
pathological process caused by the antibodies from mothers blood against the
baby's blood, aquired transplacentially. Probably aggrivated by "improper
breastfeeding" (poor intake).
Also mom is Rh negative.  Did she receive rhogam during her preganacy?  All
our Oneg moms get two doses of rhogam in pregnancy.
As to the 26 bili: What was the one immediately prior? Was it equally as high
or was it low? If the bili was low then suddenly high, and the very next bili
was 8 then I would suspect that the 26 was incorrect or that the baby was
dehydrated. Once hydrated, the bili level fell quickly because the serum was
more dilute.
In my opinion It wasn't the breastmilk causing the problem.

Any comments Dr. Gartner?

Marie Davis