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.
The degree of dilation is measured in centimeters. For most of your pregnancy, the cervix will be at zero centimeters, closed and not at all dilated, keeping the baby safe and growing inside. During active labor, your health care provider will measure the level of dilation by inserting a gloved finger into your vagina.If a woman is having her first baby, her cervix will probably efface before it dilates; in subsequent pregnancies the cervix may dilate first, then efface.). During the final weeks of pregnancy, your health care provider will examine the cervix and can report on these changes.