Health Topics

Imperforate Anus

An imperforate anus is a defect (something which is abnormal) that happens to an unborn baby while it is still growing inside its mother. The baby develops this defect or abnormality during the fifth to seventh weeks of the mother’s pregnancy.

With these defects, the anus (opening at the end of the large intestine where stool passes) and the rectum (area of the large intestine just above the anus) do not develop properly.

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Incidence of Imperforate Anus

Complications & Concerns

Risk Factors for Imperforate Anus

Associated Disorders

Imperforate Anus Diagnosis

Imperforate Anus Repair

Imperforate Anus After Surgery

Toilet Training Children with Imperforate Anus

Long-Term Outlook


Last Updated: 12/2013