I didn't even have the time or inclination to think about it.

I was wearing my tracky pants, a maternity top, bra and jumper when I went into labour. By the time I got to the hospital and was about to be examined I had taken off the jumper. My waters broke before I had my internal so I still had my tracky pants and knickers on, so I took them off. I was down to my top and bra for most of it (5 hours in total, about 2 hours in hospital). Close to the end I just had to be naked and struggled out of my top and bra inbetween contractions and just before they put the drip in my arm... (easier said than done!)