Plains All American Pipeline, L.P. (Plains) is engaged in the transportation, storage, terminalling and marketing of crude oil and refined products, as well as in the processing, transportation, fractionation, storage and marketing of natural gas liquids (NGL).
The first stage of labor is the longest and involves three phases: 1  Early Labor Phase âThe time of the onset of labor until the cervix is dilated to 3 cm. 2  Active Labor Phase â Continues from 3 cm. until the cervix is dilated to 7 cm.  Transition Phase â Continues from 7 cm. until the cervix is fully dilated to 10 cm.
Everyone is different. Some people dilate weeks before delivery.....some don't start dilating till labor has started! My girlfriend was 1cm dilated at 28 weeks and didn't deliver till 39 weeks. Also, 2nd 3rd 4th etc pregnancies tend to start to dilate earlier but still don't mean labor is eminent.