PMC10313525_01
Doppler ultrasound at 30+4 weeks gestation showing a single umbilical artery blood flow signal. (A-C) Only umbilical vein and single umbilical artery can be seen in ultrasound blood flow signal. (D) Structural diagram and vessel width of umbilical artery. (E) Various blood flow signal indexes of umbilical artery.
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F1
The fetus was suspected to have a single umbilical artery (Figure 1).
Doppler ultrasound scan at 31+1 weeks gestation. (A) Various blood flow indexes of the fetal middle cerebral artery. (B, C) Various blood flow indexes of fetal umbilical artery.
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F2
Doppler ultrasound demonstrated a pulsating umbilical vein (Figure 2).
(A) Photograph of the umbilical cord after cesarean section in Case 1. (B) Postoperative pathological section of umbilical artery thrombosis in Case 1. (C) Photograph of the umbilical cord after cesarean section in Case 2. (D) Post-operative pathological section of umbilical artery thrombosis in Case 2.
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F3
Pathological examination of the umbilical cord and placenta showed the presence of old thrombosis in one of the umbilical arteries of fetus A, multiple pseudoknots of the distal umbilical cord, and surrounding interstitial edema (Figures 3C, D).
PMC10313525_02
(A) Photograph of the umbilical cord after cesarean section in Case 1. (B) Postoperative pathological section of umbilical artery thrombosis in Case 1. (C) Photograph of the umbilical cord after cesarean section in Case 2. (D) Post-operative pathological section of umbilical artery thrombosis in Case 2.
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F3
Pathological examination of the umbilical cord and placenta showed the presence of old thrombosis in one of the umbilical arteries of fetus A, multiple pseudoknots of the distal umbilical cord, and surrounding interstitial edema (Figures 3C, D).