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.
Women can dilate several centimeters weeks early, contemplating the arrival of a preterm baby, and then remain at that same degree of dilation for weeks or go from zero dilation to having a baby in mere minutes. The following cervical dilation chart illustrates the diameter of the cervix as it opens from 1 to 10cms. 1cm roughly equates with a Cheerio, 3 cm with a slice of banana, 4cm with a Ritz Cracker, 7cm with the top of a soda can, and 10cm with a bagel.