Most of our newborn sessions last around 2 hours because we need the baby to be sleeping during the session. Newborns love to be warm, and when they are warm they sleep. Keep your studio temperature around 80 degrees and always use a concealed heating pad for the baby to lay on. Keep the heating pad on warm and it will work like a charm. You can also use one of our crocheted cocoons for keep the baby warm and snuggly. Check our our line of cocoons at our website under the newborn props