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Published on: April 17, 2019
Magnetic resonance imaging evaluation of cervical length by the women's age: a retrospective cohort study
David Charlotte1, Manel Djelouah2, Mathilde Dumange1
1Department of Obstetrics and Gynecology, Maison Blanche Hospital, Reims-Champagne-Ardennes University, Reims, France.
Insights
Cervical length increases with age and prior delivery in women. This finding is crucial for understanding how age affects cervical length measurements outside of pregnancy.
Area of Science:
- Gynecology
- Radiology
- Obstetrics
Background:
- Uterine anthropometric characteristics change during pubertal development in girls.
- Understanding cervical length evolution is key to assessing its applicability across different age groups for preterm delivery risk.
Purpose of the Study:
- To analyze the evolution of cervical length with women's age.
- To evaluate cervical length changes independent of pregnancy-related factors.
Main Methods:
- Retrospective descriptive study (March 2017-March 2018).
- Cervical length measured using Magnetic Resonance Imaging (MRI).
- Definition of cervical length based on sagittal T2-weighted MRI from external to internal cervical os.
Main Results:
- 209 patients included; cervical length ranged from 25.2 mm (under 16 years) to 39.7 mm (36-40 years).
- A significant linear association found between age and cervical length (p < 0.01).
- Women's age and prior delivery were the only factors associated with cervical length in multivariate analysis (p < 0.01).
Conclusions:
- Cervical length is significantly correlated with a woman's age.
- Prior delivery is also a significant factor associated with cervical length.
Objective:
The anthropometric characteristics of the uterus evolve with pubertal development in girls. It is therefore permissible to ask until these anthropometric characteristics change, in order to know if the cervical length criterion defined for preterm delivery threats is applicable to all ages. The main objective of our study was to analyze the evolution of cervical length with the women's age outside pregnancy to overcome factors related to pregnancy that can affect cervical length.
Material And Methods:
This retrospective descriptive study over a period of 1 year from March 2017 to March 2018. The cervical length measurements were performed by Magnetic Resonnance Imaging. The cervical length was defined by sagittal T2-weighted magnetic resonance imaging (MRI) as the distance on a straight line between the external cervical os (at the point of divergence of the anterior and posterior lips) and the internal cervical os identified by an intersection between the line of the hypersignal of the glandular epithelium and a line passing through the isthmus.
Results:
A total of 209 patients were included. The cervical length ranged from 25.2 mm on average in children under 16 years (23.6-27.1 mm) to 39.7 mm between 36 and 40 years (27.9 -58.9 mm). There was a linear association between age and cervical length, irrespective of maternal anthropometric data (Pearson's coefficient ρ = 0.43, 95% CI 0.32-0.54 (p < 0.01). In multivariate analysis, the only factors associated with cervical length were women's age (p < 0.01) and the prior delivery (p < 0.01).
Conclusion:
The cervical length is correlated with women age and the prior delivery.
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