First - 22 hours (induced)

Second - 22 hours (natural) (ended in emergency-section but he was about to crown so would have been about that long)

Third - 10 hours (induced)

Fourth - 35 hours (natural). However, hospital didnt believe I was in labour for the first 34 hours as I dilated strangely (ie, was at 2cm still but coudl stretch to 7cm etc which they dont count as 'active labour). According to the hospital I had a one hour labour which still annoys me til this day.