The “Half-Cm” Cervical Exam: Is that a thing? (With our PGY1 Guest)

Cervical exams can be tricky for the novice practitioner. Think about this: it’s a blind exam, we measure that distance using only two fingers, through a layer of tissue, sometimes with a patient moving up on the bed as we examine. That is the reality of a cervical exam. Intrapartum, some nursing staff and clinicians use qualitative descriptors like "a tight 4" or "a generous 5" to convey nuance. In line with this, some report cervical examinations in “half- centimeters”. This sounds like this: “well, her last cervical exam was 5cm but now she is 5 and a half”. Is that a thing? What does the data say? Listen in for details.

1. Hamilton EF, Zhoroev T, Warrick PA, et al. New Labor Curves of Dilation and Station to Improve the Accuracy of Predicting Labor Progress. American Journal of Obstetrics and Gynecology. 2024.

2. Hanidu A, Kovalenko M, Usman S, et al. Intrapartum Ultrasound for Cervical Dilatation: Inter- And Intra-Observer Agreement. Acta Obstetricia Et Gynecologica Scandinavica. 2024.

3. Abedi, P. (n.d.). Accuracy of ultrasound methods versus other methods for detecting of cervical dilatation during labor, a protocol for systematic review. ECronicon.