For M2 markers, only HF-MSCs were able to express CD206 and CD163 to the same extent as the positive control M2—p > 0.05, while AT-MSCs were not able to express these markers as much, exhibiting significant differences between them and the positive M2 control—p < 0.05 for CD206 and p < 0.001 for CD163. The gene discussed is MRC1; the disease is hydrops fetalis.