As for brain damage ... I have actually heard that before but can't place why or what they are referring to. I'm going to have to research that one. But as cricket pointed out, your child is still kind of young to classify as left, right or ambidextrous. It is usually around age 4.
Some years ago, there were a couple of studies that showed left-handedness to be linked with prenatally exposure to ultrasound (and this was suggested as the reason for the general rise in prevalence of left-handedness). At the time, there were certainly suggestions that left-handedness was a sign of early stress of some kind in gestation. As I understand it, though, the link didn't stand up to later attempts at replication, and was probably due to chance. I think the current consensus is that genetic factors are overwhelmingly the most important in determining handedness, and that the apparent rise in prevalence of left-handedness is probably purely because of greater acceptance of it now.
