As shown in Figure 2, our SA-β-gal staining and flow cytometry assay results showed that the percentages of SA-β-gal-positive cells or apoptotic cells in HF-MSCs overexpressing PBX1 were significantly lower than those of the empty vector group (p < 0.05; Figures 2E,F,I,J). The gene discussed is PBX1; the disease is hydrops fetalis.