giuseppesmom, may I have your permission to share your experience with some other LLL Leaders and Lactation Consultants I know to see what they know about this? It makes absolutely no sense to me that breastfeeding, a biologically normal activity as normal as pregnancy and birth, would alone be the root cause of extreme hair loss and balding patches! I looked it up in the breastfeeding text book Breastfeeding Answers Made Simple but could find no reference to hair loss. Let me know. It might help if I knew what, specifically, you were tested for, if you do not want to get into it on the forum you can PM me.