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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Which of the following is a sonographic finding of a fetus with Down's syndrome?
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The correct answer is  Second-trimester sonographic markers or "soft signs" associated with Down syndrome fetuses: Nuchal fold thickening Nasal bone absence or hypoplasia Shoened frontal lobe or brachycephaly Sho ear length Echogenic intracardiac focus Echogenic bowel Mild renal pelvis dilation Widened iliac angle Widened gap between first and second toes--"sandal gap" Clinodactyly, hypoplastic mid-phalanx of fifth digit Sho femur Sho humerus Ref: Cunningham F.G., Leveno K.J., Bloom S.L., Hauth J.C., Rouse D.J., Spong C.Y. (2010). Chapter 13. Prenatal Diagnosis and Fetal Therapy. In F.G. Cunningham, K.J. Leveno, S.L. Bloom, J.C. Hauth, D.J. Rouse, C.Y. Spong (Eds), Williams Obstetrics, 23e