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An early noninvasive means of assessing the risk of aneuploidy is which one of the following?

Which one of the following abnormalities is described as the congenital absence of the cerebral hemispheres resulting from an occlusion of the internal carotid arteries?

Sonographic findings in complete renal agenesis include all of the following except:

The major functioning unit(s) of the placenta is(are) which of the following?

Which one of the following is not a function of the amniotic fluid?

Normal sonographic appearances of the fetal chest include all of the following except:

Which one of the following is demonstrated if the division of one fertilized egg occurs 4 to 8 days after fertilization?

A specific diagnosis of a paraovarian cyst is possible only by:

Assessing amniotic fluid volume using the sum of four quadrants is called which one of the following?

An isolated unilateral cleft lip defect commonly originates: