Recently, I pulled out my list for packing my bag when I was pregnant with Marie, edited it and got my pregnancy hospital bag packed. I like to have this done about a month in advance, just in case the baby decides to arrive early and so there is time to add any last minute items I may not have thought about.
I hope you find this list helpful! The bottom line is, you really don’t NEED much. The hospital really does provide most things, but having some items of your own (like soft and cozy pajamas) make the hospital stay a little more comfortable.