RBM25 and hydrops fetalis: OE‐NC mirrored HF with no differences (p > 0.05) vs. OE‐NC, OE‐RBM25 worsened outcomes: elevated LVEDD/LVESD and reduced LVEF/LVFS (p < 0.05 vs. baseline, sham, and OE‐NC, except LVEDD at 4 weeks vs. OE‐NC p > 0.05).