I thought it referred to actual movement of the cervix, not dilation of the aforementioned va-j-j. I was talking about bones, not woman parts, well i guess they are all parts of the woman. Its too early for this now I'm just rambling
Dilation is the opening of the cervix. The va-j-j doesn't enter into it

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Yes, it is early (well, late for me). You aren't up this early because you're heading to the hospital are you?
OK, I did a quick web search. This is for you and something that all these young CAG's will need to know sooner or later. They might as well learn something here:
What is effacement?
Effacement is the process by which the cervix prepares for delivery. After the baby has engaged in the pelvis, it gradually drops closer to the cervix; the cervix gradually softens, shortens and becomes thinner. You may hear phrases like "ripens," or "cervical thinning" which refer to effacement.
Dilation: Opening of the cervix. Dilation is the process of the cervix opening in preparation for childbirth. Dilation is measured in centimeters or, less accurately, in “fingers” during an internal (manual) pelvic exam. “Fully dilated” means you're at 10 centimeters and are ready to give birth. In the same way that your health care provider may be checking for effacement in the last 2 months, your health care provider may also tell you how many centimeters your cervix has dilated.