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What causes anal atresia?

Anal atresia is a birth defect in which the anus and the part of the intestine leading up to it don't develop normally. It is the result of abnormal development of the fetus early in pregnancy, and it often occurs along with other birth defects. The causes aren't clear. 

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.