Fetal Conversion of a 3‐Vessel to 2‐Vessel Umbilical Cord: Sonographic Depiction - Gerscovich - 2013 - Journal of Ultrasound in Medicine - Wiley Online Library
A Complete Guide to the Placenta and Umbilical Cord
Umbilical Cord Vessels
Normal umbilical artery doppler values in 18–22 week old fetuses with single umbilical artery | Scientific Reports