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.
How Cervix Dilation is Measured. Dilation of the cervix is measured in centimeters. During labor, your cervix will stretch from 0cm to a fully dilated 10 cm. During a vaginal exam, cervix dilation is measured by how many finger widths fit into the opening of the cervix.If the tip of one finger fits, the cervix is 1 cm dilated. If 2 finger tips fit, that signifies 2 cm. like to think of cervix dilation like opening the door to the womb to allow baby to come out. Normally, your cervix is closed and hard, protecting your uterus from the outside environment. In order for your baby to pass through, your cervix must dilate and thin out completely.