The main objective of this study is to compare the rate of anal incontinence (measured by the
Wexner score, qualitative and quantitative (> 4)) at 3 months post partum among primiparas
with vaginal tears ≥ 2nd degree who receive a sphincter injury screening at delivery by
conducting a sphincter ultrasound in the delivery room versus a similar group of women who do
not benefit from screening.