Determination of a cutoff value for pelvic floor distensibility using the Epi-no balloon to predict perineal integrity in vaginal delivery: ROC curve analysis. Prospective observational single cohort study.
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Use of endoanal ultrasound for reducing the risk of complications related to anal sphincter injury after vaginal birth.
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How to do it: delayed sphincteroplasty for obstetric anal sphincter injury.