Peripartum Ultrasound in the Prediction and Diagnosis of OASIs

The anovaginal distance (AVD) will be measured by transperineal ultrasound ,The distance between the anal edge of the internal sphincter and the probe will then be measured in millimeters The ultrasound assessment of the anal sphincters at rest and during contraction will be performed postnatally using a dynamic 2-dimensional transperineal ultrasound with the patient in a supine position, an empty bladder.