VEGFA and hydrops fetalis: We observed the colonic submucosa layer, which accounts for 70% of the intestinal blood flow, and the immunofluorescence intensity of VEGF protein in the SHAM-WA, WA-RF, WA-HF, WA-MF, and WA-LF groups were 92.75 ± 5.03, 130.83 ± 9.39, 145.01 ± 7.37, 128.06 ± 6.11, 108,48 ± 6.65.