I agree with the others - if I see fur in the nest, I expect to find kits there, particularly with a first-time doe. Every doe is different, though, and until you have a bit of experience with a doe, you don't know what she will do.
Lots of does exhibit a change of attitude when they are pregnant - a generally friendly doe may become a real touch-me-not. Often, you will see a pregnant doe digging in a corner of her cage; she would be digging a burrow if she were on the ground. During the last couple of weeks of a pregnancy, a doe will gather nesting material; you may see her poking around in her cage with a big handful of hay sticking out of either side of her mouth. I have had a few does that pulled wisp or two of fur at this time, but most waited until just before or just after kindling for the fur. However, I did have one Jersey Wooly doe that started fur pulling 10 days or so before she was due, and kept it up; by the time the kits arrived, she was almost completely bald. Lots of people have noticed that does will often go off feed the day before they kindle, but not all does will do that.
Labor and delivery is a quick process; a doe can usually deliver even a large litter in half an hour or less. a few does may not get the job done all in one "go;" Angora breeders have told me that their breeds are notorious for spreading things out, even over a couple of days. I had one doe (also a Jersey Wooly) that had 3 babies on her due date, and 3 more a few days later, but almost every other doe I have known has been quick and efficient once she got down to giving birth - when she moves out of the nest box, she's done.
Good luck!