I know nothing about this high risk type of pregnancy but why wouldn't they do hemodialysis for two more weeks and then deliver the infant?

I think the nephrologist is not the one to decide if the mother breastfeeds.  It is her choice not his how the infant is fed.  He can give her the information but she gets to make the final say.

Creatinine in the milk?  Why don't they just measure it?  The nephrologist is being bull headed about it.  If the mother is healthy enough for herself, I can't imagine that her milk is not healthy.  What  published studies does he have that the milk is "Worse" than formula?  He goes from the standpoint that the milk is bad until proven good, you take the position that the milk is good until proven bad.  Anyway as he is not the baby doctor, it is not his position to dictate what is feed to the infant, you are.

Andrew, I suggest you become the mother's advocate in this case, to stand up to the uninformed doctor.
Jon Ahrendsen
& Becky 
parents of Andrea, Elizabeth and Karl
Clarion, Iowa