>Has anyone ever heard of this happening with the use of prenatal vit? This is a new one on me. >What do you suppose is the most likely part of the vitamins that would cause this baby to have these symptoms.?????????????? These were otc vitamins.(prenatal) Yes, I have seen this often. In fact when I have a mom call with a fussy, gassy baby, one of the first recommendations is to continue the prenatals--before going the diet route. And often the problem is resolved within a couple of days. I think that it is the ferrous sulfate (iron) that is the culprit. If baby is taking vitamins with iron(because breastmilk is soooo lacking) I suggest that she discontinue these also. If mom is anemic I suggest using another type of iron supplement, one that doesnt cause g/i problems. Patricia Gima, IBCLC Milwaukee mailto:[log in to unmask]