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.
When women are about to give birth the cervix, or opening to the uterus or womb, dilates. This is a gradual stretching of the opening as the baby is pushed outward. The amountâ¦ of dilation is often used as a measure of progress of labour. The cervix has to dilate about 10 cm before the baby can pass through.