Anus DiseasesAnus, ImperforateAnus NeoplasmsAnal CanalRectovaginal FistulaPerineumRectal FistulaAbortion, EugenicUrogenital AbnormalitiesRectumAbnormalities, MultipleRectal ProlapseDelayed DiagnosisRectal DiseasesCloacaPrenatal DiagnosisEarly DiagnosisHemorrhoidsPropanididSensitivity and SpecificityRetrospective StudiesDilatationSurgically-Created StructuresDigestive System AbnormalitiesDiagnosisUrinary FistulaBladder ExstrophyInfant, NewbornColostomyFistula