They will be selected from the faculty of physical therapy ,Cairo university

Participants performed various tasks to evaluate pelvic floor muscle activity and displacement. These included a maximum voluntary contraction ("cutting off the flow of urine mid-stream"), a pelvic floor strain ("bearing down for a bowel movement"), and the Valsalva maneuver to clear the Eustachian tubes. Additionally, phonation and respiratory exercises were conducted, such as producing the "ah" sound at different pitches, open-mouth exhalation, coughing, and semi-occluded vocal tract (SOVT) exercises using a small coffee straw, commonly used in singing warm-ups to enhance vocal efficiency. Each task lasted 3 seconds, with 1-minute rest intervals to assess their impact on pelvic floor displacement

Pelvic floor displacement during phonation will be assessed using trans-abdominal ultrasound with a 3.5-MHz transducer. Posterior bladder wall displacement will be measured in the sagittal plane with standardized markers at rest and maximal distortion. A bladder filling protocol will ensure imaging clarity. Participants will perform pelvic floor tasks (e.g., contraction, strain, Valsalva) and phonation/respiratory exercises (e.g., "ah" sounds, coughing, SOVT exercises). Tasks will last 3 seconds, be repeated thrice, and baseline and end measurements will be recorded.

the females' voice pitch will be classified by having them read "The North Wind and the Sun" three times consecutively in a quiet room, using a Samsung Note 20 mobile phone application for recording. The microphone is placed 30 centimeters from their mouths. The application measures average, median, highest (95th percentile), and lowest (95th percentile) frequencies in Hz to provide a comprehensive analysis of voice pitch and volume, aiding in assessing voice quality and potential disorders.