Some babies are too comfortable to come out, I always say ! They need some help. Kiwi delivery is basically when a doctor needs to use a pump that creates suction during the labour. Some babies head may then be bruised, swollen or/and have an unusual shape. As a Photographer, this is completely normal for me to see. You do not need to mention this to me, when coming for your session. If a parent isn't comfortable and would prefer to have their baby's head covered with hats and headbands, that's absolutely no problem. I also do my magic in post production using photoshop. This isn't something that will stay with the baby forever, so I do take a minute ( or 5 ) when editing on this. If you would have any questions, I would suggest to ask your photographer.