This study aims to evaluate women's physical body measurements and externally measurable pelvis measurements and determine their impact on labor pain level, duration of labor, and mode of delivery. The study was conducted between December 2022 and June 2023 at the Zeynep Kamil Women and Children's Health Education and Research Hospital in Istanbul, Turkey. The sample size was calculated using the OpenEpi program with a confidence interval of 80% and a sampling error of 0.05, resulting in a sample size of 139 individuals. Anticipating potential loss to follow-up during the study, the sample size was increased by 10% to 153 individuals. This sample group was divided into three equal groups, and pelvis measurement evaluations were recorded. Each group included 51 pregnant women. Data were collected through face-to-face measurements conducted by researchers using various forms, including an introductory information form, physical examination measurement form, transvaginal ultrasound measurement form, birth evaluation form, postpartum and neonatal evaluation form, visual analog pain scale (VAS) form, external pelvis measurement form and vaginal examination with pelvis measurement form.
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vaginal examination
Timeframe: Measurements will be taken during the active phase of labor, when cervical dilation is between 4-10 cm (typically 6-12 hours prior to delivery), using a manual vaginal examination performed by an experienced obstetrician.
physical body measurements
Timeframe: Within the first 6 hours after the onset of active labor (defined as cervical dilation ≥4 cm).
transvaginal USG
Timeframe: Transvaginal ultrasonographic measurements will be performed within the first 2 hours after the onset of active labor, defined as cervical dilation ≥ 4 cm. These measurements will include fetal head position, angle of progression (in degrees), and head-p