title: [Too many obstetrical sphincter ruptures].
authors.forename: Bjørn
authors.initials: B
authors.lastname: Backe
authors.forename: Ylva
authors.initials: Y
authors.lastname: Sahlin
mesh_terms: D001003:Anal Canal / Q000293:injuries* / Q000601:surgery; D036861:Delivery, Obstetric / Q000009:adverse effects*; D005260:Female; D006801:Humans; D007744:Obstetric Labor Complications / Q000517:prevention & control; D011247:Pregnancy; D012421:Rupture