CFD and hydrops fetalis: Comparing the group of HM-HF to the USP group that delivered a live septic foal and those that delivered a dead foal showed 1.5-fold (HM-HF vs. USP-LSeF, p = 0.9186) and 1.28-fold (HM-HF vs. USP-DF, p = 0.9486) higher proMMP-9 activity (Figure 5C).