Umbilical artery, ductus venosus and middle cerebral artery
View outlining the umbilical arteries by Colour Doppler
Evaluation of the umbilical artery Doppler by PW-Doppler. The Resistive index is calculated as the (Peak Systolic Velocity-End Diastolic velocity)/Peak Systolic Velocity. More on the umbilical arterial profile here.
Venous flow Dopplers of IVC and Ductus Venosus
Course of the ductus venosus when entering the IVC.
Article on Ductus venosus Doppler available here. (Seravalli V, Miller JL, Block-Abraham D, Baschat AA. Ductus venosus Doppler in the assessment of fetal cardiovascular health: an updated practical approach. Acta Obstet Gynecol Scand. 2016 Jun;95(6):635-44. doi: 10.1111/aogs.12893. Epub 2016 Mar 28. PMID: 26946331.)