About 4 hours I think - I just started pushing when the contractions got really strong and frequent, because I thought it would help things along, and the midwife didn't tell me not to, so I just carried on. I remember after 2 hours the midwife said to me "I know you think you've been pushing for a long time, but actually you haven't as labours go! It's hard work!" My LO was nowhere near fully engaged a couple of days beforehand, so actually I think I had a way to push him! My waters didn't break - eventually the midwife broke them. Then they discovered he was back to back and just wasn't moving, and my contractions slowed right down so I had nothing to work with! I had to have an oxytocin drip to get them going again, and this helped him to turn and he was born about 40 minutes later. He had his arm up by his head though, and I had a 3rd degree tear.