One of my cats gave birth 5 years ago(she got preggers at 4 months old...at the time I'd been told cats couldn't be spayed til 6 months. :\ ) and she tried to give birth in my lap. She just hopped into my lap, started purring, and then started having contractions. It seems to be my fate, lol.
However, I've never heard of a cat sleeping through contractions. Is this just the beginning stages and perhaps the contractions are strong enough yet to bother her much? From what I've read the first stages of labor can last quite a long time, 12-36 hours, but the 2nd stage(the hard contractions) is when they start running to their nesting spot.
My cat has been digging around in the places I left available to her, but doesn't seem to like any of them. I made her a nice nest box, but dug at my wardrobe instead, so I opened it up and cleared out a bottom shelf for her and lined it with a towel and newspapers, then she decided she wanted the shelf above that one...
So, needless to say, she's got a nestbox, 2 wardrobe cubies, my bed(I hope she doesn't choose THAT spot! lol), and I just opened up my closet to let her have at it and see if she finds anywhere in there she likes.
So far, she doesn't like any of the spots. sigh.