Related Experiment Video
Updated: Jul 10, 2026

Electromyometrial Imaging of Uterine Contractions in Pregnant Women
Published on: May 26, 2023
Transvaginal sonographic assessment of the cervix and preterm labor
P Tsikouras1, G Galazios, A Zalvanos
1Department of Obstetrics and Gynecology, Democritus University of Thrace, Greece.
Objective:
The purpose of the study was to assess the accuracy of cervical measurements by transvaginal ultrasonography during the 1st and 2nd trimester in the prediction of preterm labor.
Study Design:
Five hundred high-risk pregnant women in preterm labor were studied retrospectively.
Results:
A significantly higher percentage rate of preterm delivery was found in women with abnormal cervical length compared to those with normal cervical length (54.6% [118 of 216 women] vs 16.5% [47 of 284 women], p < 0.001). Also in women with abnormal dilatation of the internal cervical os the percentage was significantly higher compared to those with normal findings (78.7% [133 of 216 women] vs. 9.7% [32 of 284 women], p < 0.001). For women with cervical funneling the incidence of preterm delivery was significantly higher compared to the rest of the women (94.3% [33 of 35] vs 28.4% [132 of 465], p = 0.015).
Conclusion:
Our data confirm that sonographic assessment between the 9th and 12th week is the best cut-off period for predicting preterm labor.
Related Concept Videos
Ultrasonography
During an ultrasonography procedure, a handheld device called a...
Uterus and Cervix
The uterus is securely anchored within the pelvic cavity by paired broad ligaments on either side. It is further stabilized by three pairs of...
Imaging Studies II: Ultrasonography
Ultrasound I: Abdominal Ultrasonography
Abdominal ultrasonography, commonly known as abdominal ultrasound, is a vital, non-invasive medical imaging technique widely used in healthcare.
Procedure:
This diagnostic tool allows the clinician to visually inspect internal structures within the abdomen, including vital organs such as the liver, gallbladder, pancreas, kidneys, and spleen.
The abdominal ultrasound process begins with applying a special gel to the patient's skin over the abdomen. This gel enhances the...
Venous Thrombosis II: Clinical Manifestations and Diagnostic Studies
