It is an imaging study that uses ultrasound to assess fetal growth and biometry. In some cases, the doctor may request that color Doppler technology be added, which will allow for the assessment of maternal and fetal vascularization.

During the exam, the patient will lie down on a table and gel will be placed on the skin of the abdomen to allow for assessment of the fetus using a transducer. The results of this study will then be reported by the specialist.