SONOGRAPHIC ASSESSMENT OF UTERINE DIMENSIONS IN NULLIPAROUS PAKISTANI WOMEN AND THEIR CORRELATION WITH AGE AND BODY MASS INDEX

Abstract

Background: The uterus is a vital female reproductive organ, and its size is influenced by age, body mass index (BMI), and parity. Establishing normative uterine dimensions in nulliparous women is essential for accurate clinical assessment and early detection of pathology. Objective: To determine the average sonographic measurements of the uterus in nulliparous Pakistani women and to evaluate their correlation with age and BMI. Methods: This observational cross-sectional study included 50 nulliparous women aged 15–45 years without uterine or ovarian pathology, conducted at the Department of Radiology, Mayo Hospital/King Edward Medical University, Lahore. Pelvic ultrasonography was performed using transabdominal or transvaginal approaches. Uterine dimensions (longitudinal length, transverse width, anteroposterior diameter) were measured, and uterine volume was calculated. Correlations between uterine volume, age, and BMI were analyzed using Pearson’s correlation coefficient, with p < 0.05 considered statistically significant. Results: The study included 50 nulliparous women aged 16–42 years (mean 27.3 ± 5.6 years), with most participants (70%) aged 20–30 years. The mean height and weight were 158.8 ± 7.2 cm and 61.5 ± 12.1 kg, yielding a mean BMI of 24.4 ± 4.3 kg/m². Sonographic assessment showed mean uterine dimensions of 7.5 ± 1.13 cm (longitudinal length), 4.0 ± 0.74 cm (transverse width), and 3.3 ± 0.66 cm (anteroposterior diameter), with a mean uterine volume of 100.9 ± 53.6 cm³. No uterine or ovarian abnormalities were detected. Correlation analysis revealed a significant positive relationship between uterine volume and BMI (r = 0.236, p = 0.01) and between uterine volume and age (r = 0.352, p = 0.01), indicating that uterine size increases with both age and BMI in nulliparous women. Conclusion: This study establishes baseline sonographic measurements of the uterus in nulliparous Pakistani women and demonstrates that uterine size increases with age and BMI. These normative data provide population-specific reference values that enhance diagnostic accuracy in gynecological imaging.

Keywords: Uterus, Ultrasonography, Nulliparous Women, Uterine Volume, Age, Body Mass Index, Pakistan