Objectives: to compare the pelvic floor muscle strength in primiparous women after normal
birth and cesarean section, related to the socio-demographic characteristics,
nutritional status, dyspareunia, urinary incontinence, perineal exercise in
pregnancy, perineal condition and weight of the newborn.Methods: this was a cross-sectional study conducted after 50 - 70 postpartum days, with 24
primiparous women who underwent cesarean delivery and 72 who had a normal birth.
The 9301 PeritronTM was used for analysis of muscle strength. The mean muscle
strength was compared between the groups by two-way analysis of variance. Results: the pelvic floor muscle strength was 24.0 cmH2O (±16.2) and 25.4 cmH2O (±14.7) in
postpartum primiparous women after normal birth and cesarean section,
respectively, with no significant difference. The muscular strength was greater in
postpartum women with ≥ 12 years of study (42.0 ±26.3 versus 14.6 ±7.7 cmH2O; p=
0.036) and in those who performed perineal exercises (42.6±25.4 11.8±4.9 vs.
cmH2O; p = 0.010), compared to caesarean. There was no difference in muscle
strength according to delivery type regarding nutritional status, dyspareunia,
urinary incontinence, perineal condition or newborn weight. Conclusion: pelvic floor muscle strength does not differ between primiparous women based on
the type of delivery. Postpartum women with normal births, with higher education
who performed perineal exercise during pregnancy showed greater muscle
strength.