I would not think this is a central problem, as one of her breasts is now producing a "normal" amount. But prolactin levels are more helpful if drawn immediately before and 30 minutes after a feeding, so the rise can be demonstrated. (or lack thereof) Have you watched her pump? Sometimes one nipple is much wider than the other, but you cannot tell until the mom starts pumping. These nipples often appear "flat" with a little "button" of a nipple at rest. This would explain why baby is only making that side sore (has difficulty getting wider nipple into mouth), and decreased supply could simply be secondary to decreased removal by baby AND pump. Try 27 and 30mm diameter pump flanges and see if mom reports they are lots more comfortable, and watch for nipple elongating farther into flange when no longer "strangled". The most extreme case of pump flange size causing low milk supply I have seen was a G6 mom who had been pumping for her 25 week premie for 3 MONTHS...only getting drops. She persisted because she had nursed the prior 5 without difficulty. When we put large flanges on her, she had a full milk supply in another 3 weeks. Kathy Leeper, MD, IBCLC Lincoln, NE *********************************************** To temporarily stop your subscription: set lactnet nomail To start it again: set lactnet mail (or digest) To unsubscribe: unsubscribe lactnet All commands go to [log in to unmask] The LACTNET mailing list is powered by L-Soft's renowned LISTSERV(R) list management software together with L-Soft's LSMTP(R) mailer for lightning fast mail delivery. For more information, go to: http://www.lsoft.com/LISTSERV-powered.html