Sarah,
Breastfeeding and Human Lactation, 2nd Edition, page 325.
I would also like
to know if there are any written references about this. There really is
nothing in Ruth Lawrence, Womanly Art of Breastfeeding, Breastfeeding
Answer Book or any other source that I have around. I KNOW that long
intervals between bowel movements, even up to and past two weeks,
are fine but it would be nice to have a better reference.