That's a strange question. I don't recall reading about a broken neck being a complication of any birth in any of my ob reading while I took ob, unless the ob doc was really careless with that extractor tool they use I guess. Broken shoulders and hip dislocations are much more common. The other possibility I suppose would be if the baby were born with osteogenica imperfecta, like that guy in "unbreakable" the movie, then I guess you could break a babies neck. Your right though, I don't even hear about babies breaking their neck in trauma cases, I suspect that their necks are fairly flexible and other things break first.