Fig. 2

Hemodynamics arrangement of the UAT fetuses (GA at diagnosis: 36^1/7 weeks). A Waveforms from UA, the value of S/D and PI were both abnormal (<5th centile for gestational age). B Waveforms from MCA, the value of PI was abnormal (<5th centile for gestational age). C Ductus venosus Doppler recording showed the ‘a-wave’, which was close to the zero line. D, Hyperechoic thromboembolism (yellow arrow) was observed in a part of the UA through two-dimensional ultrasound. E Colour Doppler flow showed only one umbilical artery in the section of bladder. F Excessive torsion of umbilical cord presented by gross observation