Bladder base displacement during abdominal muscles contraction and functional activities in primiparous women assessed by transabdominal ultrasound: A descriptive study - Arranz-Martín, B.; García-Gallego, P.; Romay-Barrero, H.; Navarro-Brazález, B.; Martínez-Torres, C.; Torres-Lacomba, M. (Journal of Clinical Medicine, 2022)