Fig. 2From: Reliability and validity of pelvic floor muscle strength assessment using the MizCure perineometerTransperineal mid-sagittal plane ultrasound image in healthy women: At rest (a), during pelvic floor muscle contraction (b). Urogenital hiatus diameter was measured as the distance between the anorectal junction and the inferior border of the pubic symphysis (white double headed arrow). The levator ani muscle was determined based on the hyperechogenic region posterior to the anorectal junction. The correct pelvic floor muscle contraction indicated the cranial ventral displacement of the levator ani muscle, and urogenital hiatus diameter was shortened. A anus, B bladder, P pubic symphysis, R rectumBack to article page