Pre-labor Ultrasound as a Visual Biofeedback Device for Maternal Pushing Education

"1. Ultrasound examination with the screen turned to the provider will assess the bladder movements at rest and during contraction of the pelvic floor and fetal head descent at rest and during pushing.~2. The provider will turn the screen to the patient and explain the anatomical landmarks: bladder, fetal head, birth canal direction.~3. A repeat of the first stage (1) with the screen turned to the patient: the biofeedback process. Bladder displacement will serve as a marker of pelvic floor contraction, and the delta in the progression angle will serve as a marker for effective pushing.~4. Finally, the provider will turn the screen again from the patient and repeat the first stage."