The phrase "hour labour" refers to the amount of time it takes to complete a specific job or task. It indicates the duration of work required to accomplish something. Full definition
So, after a 20 hour labour with pethidine and the stitch - up from hell (1 1/4 hours of stitching with a local anaesthetic that didn't work, and no epidural available because it was «out of hours» - women in that situation are not seen as a high priority for pain relief!) (breastfeedingmums.com)
Every pregnancy and birth is different - just because your friend Peggy had a 96 - hour labour does not mean that you will! (bounty.com)
You couldn't possibly know what it's like to squeeze an 8 - pounder out of your uterus after a 24 - hour labour when pain relief measures barely took the edge off. (bounty.com)