@article{article_1783419, title={The efficacy of transperineal and transabdominal ultrasound findings in predicting spontaneous vaginal delivery during active labor}, journal={Journal of Health Sciences and Medicine}, volume={8}, pages={1076–1081}, year={2025}, DOI={10.32322/jhsm.1783419}, author={Büyüknisan, Ekin and Yücel, Neşe and Yücel, Oğuz and Gül Aydın, Şule and Yazkan, Esra}, keywords={Fetal head, labor, obstetric, ultrasonography, prenatal}, abstract={Aims: This research sought to assess the clinical value of transperineal and transabdominal ultrasound measurements, particularly angle of progression (AoP), head-perineum distance (HPD), and midline angle (MLA), in relation to mode of delivery during the active phase of labor. Methods: In this prospective observational design, pregnant women in active labor were enrolled and underwent repeated transperineal and transabdominal ultrasound examinations. Hourly AoP, HPD and MLA measurements were performed. Patients were classified according to delivery mode (spontaneous vaginal birth or cesarean section) and the changes in ultrasound parameters were compared between groups. Multiparous and nulliparous women were also analyzed separately. Results: Mean AoP values remained significantly greater in the vaginal delivery group throughout all time points when compared to the cesarean group (p <0.001). HPD measurements were significantly increased in the cesarean group beginning as early as the first hour (p≤0.001). Multiparous women had consistently higher AoP values than nulliparous women throughout active labor (p <0.01), with the difference persisting at the onset of the second stage. Analysis revealed that smaller AoP values at the onset of active labor were significantly related to longer labor courses, confirming a negative correlation. Higher MLA meauserments were observed in the cesarean group within the first hours of labor (p <0.001). Conclusion: Serial measurements of AoP, HPD and MLA by ultrasound provide objective and reliable information for predicting delivery mode in active labor. By integrating these ultrasound findings into practice, clinicians may be able to make better decisions and manage labor more efficiently}, number={6}, publisher={MediHealth Academy Yayıncılık}, organization={No financial support was received from any institution or organization for this study.}