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A 28 year old comes in with vaginal spotting.  She is 8 weeks pregnant.   What are the arrows pointing to in the image below?

A sonographic exam reveals legs on a fetus that appear fused.  The sonographer never sees the legs separate and she/he cannot find any feet.  Which is the most likely diagnosis?

Which pathology is demonstrated by the ultrasound findings of no cranial vault or cerebral hemispheres, polyhydramios, increased fetal activity, and bulging eyes?  

Which sonographic finding describes the cerebellum with a Chiari II malformation?

Venous Doppler flow pattern varies because of the patient’s respiratory changes.

The union of the _____ forms the IVC.  

After refrigerant lines have been installed, they should be evacuated to a(n) ____ vacuum.

____ used at the end of a metal duct run will help reduce any noise that may be traveling through the duct.

When the length of quick-connect precharged line sets is altered, the charge will not normally have to be altered.

A boot in a duct system is a fitting used ____.