I don't want my families to have to bring anything - except the baby. I provide everything needed for the session. However, feel free to bring anything you want to incorporate in the images like family heirlooms.
Newborn sessions can take a long time since we work at the baby's pace, so plan on feeding your baby while at the studio. You may want to bring a change of clothes for mom and dad (just in case...). Don't forget the diaper bag. A sponge bath prior to the session to reduce skin flakes and crusty eyes can help, then put on a loose diaper to minimize elastic marks. I hope this helps in conveying what you can expect at a newborn session.