A G3P2002 patient presents for prenatal care and the physica…
A G3P2002 patient presents for prenatal care and the physical exam indicates that the baby may be small for gestational age. The mother does not smoke or drink alcohol or use illicit drugs. She does not have any known complications, such as HTN, anemia, renal disease, malnutrition, lupus, etc. Neither she nor her husband have constitutionally small statures. Her previous pregnancies did not involve SGA infants. Which of the following tests will best evaluate placental function to determine if poor placental function is the cause of SGA?