The hospital usually provides everything that your baby will need after birth. Diapers, wipes, rash cream, utilities for your baby will all be there for you to use. Of course, a diaper bag is a must to bring to the hospital but not filled with extra items since everything else is available at the hospital.  You should bring a bodysuit, mittens, socks, a soft towel, cloth nappies, clothes, and an outfit for when going home. This is usually what you should be bringing in the diaper bag.