I wore a loose nighty with nothing underneath (my waters broke at the beginning of labour so I kept leaking fluid - I went through about 4 pairs of knickers & pads before I gave up). Toward the end of the pushing stage I ripped the nightie off so I could have skin to skin contact with my bub. I'm normally quite a modest person but its funny how little you care about being naked when there are far more important things to be concerned with!! Like the others have said, I have no idea how long I was naked for - I only remember my son being placed on my chest and a warm blanket being placed over us both.