How long can dilation be?

I think it is very much depending on individual. I dilated 2cm a week before my actual labor kicked start for no.1 and no.2. During the actual labor, I dilated to 10cm within 2.5hours for no.1 and 20mins for no.2.

Hi In early labour, it can take 2-3 weeks ...you can be already dilate 3cm weeks before. If you are already at 7cm.. it will be another hour or two to reach 10cm.

Case to case basis, some can be 3cm at 30 weeks and still teach full term. I was 3 cm for 10 days before inducing my ob didnt want to wait due to risk of infection