CD86 and hydrops fetalis: Regarding M1 markers, macrophages co-cultured with HF-MSCs and AT-MSCs showed significantly lower expression levels of CD86—p < 0.01 and p < 0.001, respectively—and MHC-II—p < 0.001 and p < 0.001, respectively—than the M1 control group, reaching values like or even lower than the M2 control.