i was fully clothed when labour began, and stayed that way until i got in the bath, then i wore nothing. From then i was in and out of the bath and bed (it was the middle of the night, we were sleeping and hadn't called the MW to attend yet) and during that period i wore a t-shirt and underwear (black, which meant the show didn't stain them) when i wasn't in the bath (i couldn't wear a swimsuit when i was alone in my own bath, it seems really weird to me!). My dad arrived at 6am and i was in pants and tee, shortly thereafter i got in the bath again, naked and i stayed naked after that.
The MW came as i was grunting and thought i needed her (ctx still 10mins apart). I was fully delighted (sic) and had DD about 40mins after the MW got there, on my knees next to my bed, still naked. I caught her myself :)
I was naked PP for about 2 hours (we had the heating cranked and it was one of the sunniest days of 2010), then i just put pants on to hold the PP pads in place. I stayed that way (had the PP sweats and didn't think i should have to get dressed in my own bedroom if i didn't want to! lol) for a few days. I'd put a tee on if anyone visited, but took it off again when they left.
Nudity is a non-event in our family. when the ILs came i did stick a tee on.