Inclusion Criteria:  Patient whose age is ≥ 18 years Patient with an obstetric anal sphincter injury diagnosed in the delivery room Patients referred for a pre-rehabilitation perineal assessment between June 2016 and February 2021 French-speaking patient  Exclusion Criteria:  Patient with occult obstetric anal sphincter injury Patient under guardianship or curatorship Patient deprived of liberty Patient under court protection Patient objecting to the use of her data for this research