As others have said, guidelines are baby born within 1/2 hours of pushing.
According to my notes, i had a 12 hour pushing phase. 'Push' first mentioned in my notes at 6am, baby born at 6.06pm.
However, that's not strictly true. I was in transition around 6am, and an ove-keen midwife noted that. However then at the shift change, the new midwife freaked me out (she couldn't find the heartbeat when she came to check me, a close family member lost their baby through an un-noted mismanage birth so that really frightened me).
Everything slowed and stopped. Contractions still coming but only every 10 mins or so, and weak. As well as being afraid i was also running a temperature (undiagnosed illness), cold (room cold, they couldn't warm it up), tired and hungry (had been in active labour for 24 hours by 6am).
I needed comfort, warmth, to eat and sleep.
What i got was a stream of different midwives telling me how to push. Doctors appeared and started piling on the pressure at about midday. I did then ask to be allowed to sleep. They gave me half an hour. I was just about starting to drop off when they crashed back in 27 mins later to announce 'this isn't really working is it'
Put me on the induction drip, didn't work (contractions didn't feel any different to me). Coached pushing in exactly the position i didn't want to be in. In the end i requested a ventouse help, i knew i didn't have it in me and sooner or later it would be a crash c-section.
I had an episteoemy and PPH. Lost 1.5 L of blood. But no prolapse or any concerns whatsoever about mini-dougal.
The whole thing still pisses me off TBH. A warmer room, a pool, someone, (ANYONE) who had supported me to get what i needed (comfort, warmth, food, sleep) and i would have delivered much sooner, myself, with less trauma all round.