Dilation Isn’t Everything: The many jobs of your cervix.
A mother waits patiently on the small triage bed while the nurse concentrates on what her fingers are telling her about the progress of this labor. After a minute, she pulls her fingers out, and chirps brightly, “You are 5 centimeters dilated!” She flips her gloves into the trash can and turns to the computer to chart.
It’s a universal experience going into a hospital in labor. The progress of labor is reduced to a number between one and ten, and nothing else. An hour later, after being admitted to her room, the mother is told she is “still only a 5.” Once again, she isn’t a mother, she is a number. She is left alone to contemplate that, and to deal with it as she may.
Most of us tell our birth stories in terms of this number. “I was stuck at 5 forever!”
What if I told you that this number means very little when it stands alone? What if I told you that your cervix does a whole lot more than just dilate? What if I told you that there are more ways to measure progress in labor than that ubiquitous range of centimeters?
Well, it’s true.
My preceptor and mentor, Desirre Andrews says:
“There is a mystery surrounding cervical dilation and changes prior to and during labor. I like to think of it as the jobs of the cervix. The cervix does so much more than simply opening.”
So, the next time you have a baby, and you are facing a vaginal exam, make sure you ask about what else your cervix is doing!
Hold up your pointer finger. Touch the second knuckle. From there to the tip of your finger is about the length of your cervix. In order for the cervix to dilate completely, your cervix has to shorten, or “efface,” completely. This is measured in percentages. If your cervix only reaches from the tip of the finger to the first knuckle, you are about 50% effaced. This process must happen before dilation can even occur. In many women, it occurs at the same time or it overlaps dilation. In first time moms, we often see effacement first, then dilation quickly follows. What if our mother was told that, while she was “still 5,” she went from 50% effaced to 90% effaced? That’s progress, people!
Touch the tip of your nose. (You didn’t know this would be so interactive, did you?) That’s about the texture of a closed, uneffaced cervix. That’s no good for dilation, and it has to soften, or “ripen” in order to do its other jobs. This primarily happens before labor, but can also happen throughout labor. The texture of your cervix must work its way to the softness of your relaxed lips, and then softer still to match the texture of the inside of your cheek. We call cervixes at this stage “soft like butter.” Yet another measure of progress. If our mother were still at 5, but her cervix was much softer and more difficult to feel, that’s progress!
To protect your baby, your cervix points towards your tailbone (posterior) during pregnancy, and sometimes even early labor. In order to open and allow the baby to move through it, your cervix must shift its position until it is pointing directly into your vagina (anterior). If our mother were told that though she were “still 5,” but that her cervix was easier to reach, this job has been done, and she has made progress!
Last, but not least we have dilation. Your cervix must open up from a tightly closed position, all the way up to “10 centimeters.” Really, it’s not 10, though. At this point, nothing can be felt except baby’s head. It’s often now simply called “complete dilation.” The thing to realize about dilation is that it cannot happen unless the cervix is doing all of its other jobs already. They often happen seemingly in tandem, but sometimes a mother will be “stuck at 5” while her cervix is effacing, softening, and moving forward. Once those jobs happen, dilation is a downhill race to the finish (though it may not seem like it).
So, the next time you consent to a vaginal exam in labor, make sure you get more than a number. Ask about effacement, softness, and the position of your cervix. Your cervix is amazing and has a lot more to do than just open. Make sure it gets all the credit it deserves!
Were you informed of the various ways the cervix works before and during labor? How might this change the way you approach your future pregnancy care?