PMC6409068_01
The peak systolic flow velocity of the fetal middle cerebral artery during pregnancy. (:) The median MCA-PSV level in normal pregnancies; (  ) 1.55 MoM; ( ) our case. MCA-PSV: the peak systolic flow velocity of the fetal middle cerebral artery; MoM: multiple of the median.
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fig1
Although the titer of anti-Jra did not change (1:256), the MCA-PSV level began to increase at 24 weeks and exceeded 1.55 multiples of the median (MoM) at 28 weeks (Figure 1). The MCA-PSV level (65.6 cm/s) was >1.55 MoM (Figure 1). On the seventh day after the first IUT, the MCA-PSV level was >1.55 MoM, suggesting the exacerbation of fetal anemia (Figure 1). After the second IUT, an ultrasound examination showed that the MCA-PSV level remained within the normal range and that the CTAR level had normalized to 31.6% (Figure 1). At 34 weeks of gestation, the fetal MCA-PSV and CTAR levels increased to <1.5 MoM and 39%, respectively (Figure 1).