RESUMO
INTRODUCTION AND HYPOTHESIS: We used clinical examination and transperineal 3D/4D ultrasound (US) to evaluate pelvic floor muscles (PFM) after different delivery modes. METHODS: Women were surveyed using validated questionnaires. PFM were evaluated and classified according to the Modified Oxford Scale following 3D/4D transperineal US. For statistical analysis, Kruskal-Wallis, Mann-Whitney, chi-square, and Fisher exact tests were used. RESULTS: Fifty-three women were evaluated: 32 with previous vaginal delivery (VD) and 21 with cesarean section (CS) (8 nonelective and 13 elective). No significant difference among groups was observed regarding urinary incontinence (UI) after delivery (p = 0.39), loss of muscle strength referred by the patient (p = 0.48), or evaluated through digital examination (p = 0.87). No patient with elective CS had avulsion, with difference between VD and elective CS (p = 0.008). US evaluation identified no differences in bladder-neck elevation (p = 0.69) or descent (p = 0.65) , and no difference in genital hiatus size (p = 0.35), levator ani thickness (p = 0.35 -0.44), or presence of major or minor levator ani avulsion (p = 0.10). CONCLUSIONS: We evaluated primiparous women within 12 to 24 months of delivery and found that VD was associated with PFM avulsion. There was no difference among VD and nonelective or elective CS in symptomatology or other anatomic alterations evaluated through 3D/4D transperineal US.