Verifying Post-delivery Anal Sphincter Integrity Using Perineal Ultrasound: Impact on Immediate Care

Inclusion Criteria: * The patient must have given her informed and signed consent * The patient must be insured or beneficiary of a health insurance plan * The patient is available for 3 months of follow-up * Paturient, vaginal births only * Presence of \>= stage 2 perineal lesion * Patient accepts a priori the performance of a perineal ultrasound Exclusion Criteria: * The patient is participating in another study (excepting BBBOX (2011-A00327-36), ElastoMAP (2013-A01148-37), ElastoDéclench, BAKRI, Papillo PMA, GrossPath, LXRs, DGPostPartum, "scalp lactates", and UpSideDown studies) * The patient is in an exclusion period determined by a previous study * The patient is under judicial protection, under tutorship or curatorship * The patient refuses to sign the consent * It is impossible to correctly inform the patient * Delivery by C-section * Intact perineum after delivery (no indication for perineal surgery in light of absence of vaginal lesion) * Emergency situation preventing time for perineal ultrasound * History of anal incontinence before giving birth * Allergy to ultrasound gel