My waters broke at 10, my contractions started at 12 - but they were very intense as soon as they started and never has a break between them - I was glad I was in hospital from the first moment because I couldn't have done anything else! Anna was born at half 8. So my labour was technically 10 hours long, but from contractions to birht was 8 and a half - the time flew by, though!
[edit: I'm taking my labour from the moment my waters broke, but I did have flu symptoms early that morning (shaking, shivering, fever, sickness etc) and an unbearable hip pain that meant I couldn't move - I don't know if that was part of my labour or not

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