To take a good picture of a newborn is much more difficult than a 2-6 year-old in my experience. I almost exclusively shoot children. In the past two years I've shot about two dozen children's portrait sessions and about one dozen newborn sessions. Lighting a newborn is easy because it's pretty much like shooting still life. Getting both the pose and perspective right can be very challenging. I still learn something every time I shoot a newborn and it never has to do with f-stops, lighting ratios, etc. When you get it right though it's very satisfying as you know that you are capturing a moment that is the most fleeting. I have a new 6-week-old of my own and you can almost watch her grow!