As Haylie was leaving home at 2:40 she messaged me to ask if contractions had started getting closer together, as she was trying to decide whether to call the second midwife yet or not. At that stage I told her they were mostly 3.5-4 minutes apart and lasting 50-70 seconds, although I had just had a spacing of 5 minutes, so there was still definitely some variation and irregularity. Dilation is rarely a perfectly linear process!