I remember with my first child reading the books, watching videos to prepare for birth, which were great BUT nothing prepared me for the body I was left with after labor.
First off hemorrhoids, No one told me that there was a good possibility of getting hemorrhoids due to the pressure of pushing a little one out. I had never even had them before. ( My second child I didn't even push and got nothing)
Than there's tearing, again no one said that was possible and that you may need to be stitched up after and have trouble sitting on anything. I had to sit on the breast feeding pillow I had so that there was no pressure down there.....Lots of fun, not.
The big shocker for me was that I still looked 5 months pregnant afterwards. SOMEONE should have told me that one. I remember thinking, ok the baby is out and yet I look like there's something still in there, why and when will it get back to the way it was. (I had gained 25lbs so didn't really have a lot left to lose after, certainly not the the way my belly looked, which was puffy and soft.)
Lets not forget about your hips, apparently it took 9 months for them to widen and it takes time for them to return to normal.
These are a few of the things I encountered that I thought some of the first time moms might want to know and prepare for, just in case. Perhaps other moms will have some more info for you.
Good luck and congratulations to everyone