[Too many obstetrical sphincter ruptures].
Backe
Bjørn
B
Sahlin
Ylva
Y
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