PRE-registration at hospital?

Ok I'm going to sound dumb as rocks to everyone that has done this before but I have a question. I work 12 hr shifts and can't really get out of work easily. With that being said, I am already 9 months pregnant and need to register with my hospital. 
I was on their website and they allow labor and delivery pre-registration..... does that mean it'll be partially registered? Is there another step to sending your info? Or is that just being registered before the big day? 

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