Newborn babies are only small for the first two weeks of life. Documenting those tiny newborn features is something you will cherish in years to come as it brings back memories of how tiny your newborn baby was when you first arrived home from the hospital. As a Mum myself I have a little box full of tidbits from my son's first couple of weeks.....first dummy, tag from the hospital, ultra-sound photos, and of course photos taken in the hospital. As he got older I've even kept a lock of his hair from his first haircut and all his baby teeth (I was told it was a good idea to hold onto these)! They may not be worth anything to anybody else but the sentimental value is huge for me.
I always photograph a newborn's tiny details including toes, fingers, eyelashes, body hair, belly button, etc. so that you'll never forget the essence of their features as they literally change overnight.