These anomalies constitute the largest of congenital malformations of the gastrointestinal tract and occur in 1/3500 to 1/5000 live births. Males are more frequently affected than females. Most of these anomalies result from abnormal development of the urorectal septum. However, the anal stenosis, and anorectal and rectal atresias may be examples of intestinal stenosis and atresia in general.The anorectal malformations are generally classified into two groups: high and low, depending on whether the large intestine ends above or below the level of the pub-orectalis part of the levator ani muscle