Are there age-related changes in the measurements of the urethral sphincter complex in nulliparous women? A three-dimensional ultrasound assessment.

Introduction And Hypothesis: The objective was to determine age-related changes in measurements of urethral sphincter complex components in asymptomatic nulliparous women.

Methods: Eighty nulliparous women ≥18 years underwent 3D ultrasound of the anterior pelvic compartment in a cross-sectional study. Measurements of the urethral sphincter components (smooth muscle sphincter [SMS] and striated urinary sphincter [SUS]) and urethra including area, length, width, and distance of the SUS and SMS from the urethrovesical junction were obtained.