<prompt> Uteroplacental blood flow at term is :300-500 mlmin500-700 mlmin700-900 mlmin900-1100 mlmin  <response>: Using ultrasound to study the uterine aeries, uteroplacental blood flow has been measured to increase progressively during pregnancy from approximately 450 mlmin in mid trimester to nearly 500-700 mlmin at 36 weeks. Ref: Williams Obs 25 e pg 132. 