Expression of HF signature molecules atrial and brain natriuretic peptides (encoded by NPPA and NPPB, respectively) were increased after AB, as expected (A-C in S4 Fig), however levels were comparable in FMOD-KO and WT mice 2, 4, or 12w post-AB, consistent with similar degree of cardiac stress and HF. Here, NPPB is linked to hydrops fetalis.