10/12/2026
Here’s the deal:
Dilation AND effacement both matter. That’s 10000% true.
Neither one is automatically more important than the other, and changes in EITHER (or both) can be part of cervical progress.
But here’s something I want you to understand:
Dilation = the opening of your cervix (0–10 cm)
Effacement = the thinning of your cervix (0–100%)
And while they can happen simultaneously, effacement OFTEN starts before significant dilation. In my experience, the VAST majority of my patients were 100% effaced before they reached 10 cm.
Think about those hard candies with the hole in the middle? 👉🏼 As you suck on them, the candy gets thinner before that hole dramatically increases in size, right?
That’s kind of how I think about the cervix.
As your cervix thins, it’s changing and preparing to open as labor progresses.
So personally? I LOVE to see that effacement.
To me, that tells me that my (or yours!) cervix is getting nice and thin and baby’s head is well applied to it.
So I don’t care if I’m “only” 0 or 1 cm in that scenario. I’m much more interested in the fact that my cervix is thinning, changing, and getting ready for what’s next.
Which is of course - DILATION.
Again, both matter!!!! Either can change at any time. And neither measurement tells us the whole story of how labor will progress.
But personally and professionally, I love seeing a nice, thin cervix getting ready to open.
Make sense?
If you’re new here, hi, I’m Lo! I’m a labor and mom/baby nurse, lactation counselor, and mama x 4. For more easy to apply tidbits about birth, follow along Lo RN, MSN, CLC | Birth, Postpartum, Breastfeeding Making birth easier to understand for you is my fav!