Purpose of evaluating the fetal lips on Ultrasound

What is the purpose of evaluating the fetal lips on Ultrasound?

Evaluation of the fetal lips at the time of routine second trimester US can detect a cleft lip, the most common facial anomaly. A cleft lip can be unilateral or bilateral and is associated with a cleft palate in up to 80% of cases. Cleft lip and palate can be isolated or associated with trisomy 13 or 18, amniotic bands, or a limb-body-wall complex, all of which carry a poor prognosis for the fetus.


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