What is the accuracy of an abdominal ultrasound at 11wks?

Very Accurate: It is very accurate imaging.

Skilled: visualization of all extremeties flexing and extending, yawning, hiccuping, facial features--mandible, maxilla, lips, nasal bone, distance between eyes, normal skull bones, all toes, foot shape,fingers flexed and extended, brain hemispheres and lateral ventricles,flexion and extension of the neck and spine, stomach bubble below left hemidiaphragm, abdominal and placental insertion of 3 vessel cord