Pelvic floor dysfunction in primiparous women up to 6 months after delivery: cohort study - Oliveira, Sheyla Guimarães; Becker, Adriana Caroci; Mendes, Edilaine de Paula Batista; Riesco, Maria Luiza Gonzalez; Oliveira, Robson da Costa; Oliveira, Sonia Maria Junqueira Vasconcellos de (Revista Brasileira de Enfermagem, 2021)