Kathy and all, I worked with a mother who had cystic fibrosis and was breastfeeding. She basically had no problems with breastfeeding although she called me because the baby was having some bloody stools. This was awhile ago and I'd have to look up the file to remember details, but I know that she kept on breastfeeding and he was fine eventually. Breastfeeding did not cause her any particular problems. Anyone else? Janaki Costello, IBCLC in El Cerrito, CA. where we had summer today!