Related to the recent discussion regarding women with very large breasts nursing, I found this website while surfing, to which you might direct your large-breasted clients if they have internet access:
http://www.plus-size-pregnancy.org/NursingWhenWellEndowedFAQ.html

A small caution:  I did not have time to read this entire page, as it is very long (22 sections), but I did skim it and what I saw looked OK to good - as well as hints for positioning, etc., strongly discourages supplements, encourages night feeding, specifically recommends consulting an IBCLC if problems encountered, encourages the "well-endowed woman" to breastfeed in public, etc.

Barb Strange

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