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

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

The “lemon sign and banana sign” are mostly usually associated with

A complex mass appearing on either side of the fetal neck is MOST likely to be a:

High levels of AFP indicate all except which of the following?

Normal bowel herniation should migrate back into the abdomen by ___ weeks. 

The arrow is pointing at which structure in the fetal skull?

Cordocentesis is more commonly used for which one of the following procedures?

Renal malformations may be divided into which of the following two categories?

What sonographic finding confirms the presence of a diamniotic pregnancy?