Correlation between Parturients’ Uterine Artery Blood Flow Spectra in the First and Second Trimesters of Pregnancy and Fetal Growth Restriction

Figure 2

Comparison of blood flow spectra in the early pregnancy and pregnant metaphase ( ± s). Note. # indicated  < 0.05. (a) The blood flow spectrum in early pregnancy; the horizontal axis from left to right indicated UtA-PI, UtA-RI, and UtA-S/D, and the vertical axis indicated the blood flow spectrum; the black areas indicated the FGR group, and the gray areas indicated the control group. In the early pregnancy, the UtA-PI, UtA-RI, and UtA-S/D indicators of the FGR group were significantly higher than those of the control group (1.86 ± 0.67 vs. 1.39 ± 0.69, 0.74 ± 0.12 vs. 0.64 ± 0.10, and 3.92 ± 0.87 vs. 3.34 ± 0.88,  < 0.05). (b) The blood flow spectrum in the pregnant metaphase; the horizontal axis from left to right indicated UtA-PI, UtA-RI, and UtA-S/D, and the vertical axis indicated the blood flow spectrum; the black areas indicated the FGR group, and the gray areas indicated the control group. In the pregnant metaphase, the UtA-PI, UtA-RI, and UtA-S/D indicators of the FGR group were significantly higher than those of the control group (1.41 ± 0.96 vs. 0.98 ± 0.32, 0.70 ± 0.14 vs. 0.59 ± 0.13, and 3.12 ± 0.94 vs. 2.62 ± 0.68,  < 0.05). (c) The TAMX in the first and second trimesters of pregnancy; the horizontal axis from left to right indicated the two periods, and the vertical axis indicated TAMX (m/s). In both periods, the TAMXs were significantly lower in the FGR group than in the control group (0.24 ± 0.11 vs. 0.57 ± 0.12 and 0.37 ± 0.12 vs. 0.65 ± 0.15,  < 0.001).

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