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Anatomy
A 3-month-old female infant is diagnosed with anal stenosis after several periods of stool infrequency, two of which lasted 10 days without a bowel movement. Which of the following is the most likely cause of this condition?
Incomplete separation of the cloaca by the urorectal septum
Dorsal deviation of the urorectal septum
Failure of the anal membrane to perforate
Abnormal recanalization of the colon
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