_ABSTRACT_ _OBJECTIVE:_ THE USUAL REPORTED INCIDENCE OF IMPERFORATE ANUS 1 PER 5000 LIVE BIRTHS. THERE IS SLIGHT PREDOMINANCE IN MALES. THE INCIDENCE OF THESE ANOMALIES IS NOT AFFECTED BY THE PARITY OF THE MOTHER, THE MOTHER'S AGE, OR THE RACE OR NATIONALITY OF THE CHILD'S FAMILY. IMPERFORATE ANUS IS CLASSIFIED INTO HIGH, INTERMEDIATE, AND LOW ACCORDING TO THE LEVEL AT ... Read more