Congratulations on your litter of puppies! You've gotten lots of good advice already...txshopper73 covered lots of crucial information.
I might add to watch the momma carefully for any signs of engorged teats and/or eclampsia (milk fever). Not saying that your female will get either of these conditions, but just to be aware.
If you google "Debbie Jensen", you will find alot of good information on breeding, whelping, and puppy care there.
Oh, and when you get a chance.......we'd all LOVE to see some pictures!
WELCOME TO YORKIE TALK!