This defect of the cerebellum is often noted sonographically in association with Arnold-Chiari syndrome.

A cystic mass in the umbilical cord is usually which one of the following?

Eighty percent of cystic hygroma occur in which region?

The testes are not visible within the scrotal sac until approximately _____ weeks’ gestation.

Which of the following lists the correct flow of urine through the kidney?

Match the following prenatal diagnostic terms with their definition.

What forms the lateral margins of the normal thoracic cavity?

The quadruple screen evaluates all except which of the following?

In most open neural tube defects, the _____levels are elevated.

A spinal defect containing meninges and neural tissue is MOST likely to be a: