Fetal breathing is associated with increased umbilical blood flow - Nyberg - 2010 - Ultrasound in Obstetrics & Gynecology - Wiley Online Library
Fetal circulation - Wikipedia
Wave reflections in the umbilical artery measured by Doppler ultrasound as a novel predictor of placental pathology - eBioMedicine
Assessment of Fetal Compromise by Doppler Ultrasound Investigation of the Fetal Circulation | Circulation
Umbilical Artery Doppler – Sonographic Tendencies
Umbilical Cord Compression and Your Baby's Health | Birth Injury Guide
Growth and Doppler ultrasound – Maternal Fetal Medicine
Umbilical Artery Doppler Assessment: A How-To Guide | Empowered Women's Health
Normal umbilical artery doppler values in 18–22 week old fetuses with single umbilical artery | Scientific Reports
Umbilical Artery Doppler Ultrasound Normal Vs Abnormal Image Appearances | Spectral Doppler USG - YouTube
Umbilical Artery Blood Flow
Abnormal Fetal Umbilical Cord Doppler? What Should I Do Next? A Case Study Demonstrating Corroboration of Umbilical Cord Doppler and Middle Cerebral Doppler - Michelle M. Morrissette, 2012