Being a nurse I'm sure you've seen your share of blood, and other things
. One thing that I wasn't told was to watch videos to see a yorkie give birth (textbook with no complications of course). So I suggest to you that you should go to youtube.com and watch some yorkie births. It gives you an idea but doesn't compensate for the real thing.
You sound like you've done so much research. That is a great thing!!! I would like to know how you began researching the yorkie lines?