It is always a delight to see newborns come back as roly poly babies.  So much wonder and curiosity has started to flow out of their adorable little bodies.  Baby sessions, or "sitter sessions" as we call them, take place when baby is strong enough to sit up on there own but not yet crawling, which is usually around 6-8 months of age.  Also in the 'Baby' stage are 1 year olds.   I suggest for your baby's first year three shoots: newborn, sitter and one year.