In addition, several foetal genes, e.g. limb‐bud and heart (Lbh), frizzled receptor‐2 (Fzd2), fibulin‐1 (Fbln1), and tenascin C (Tnc), were identified to be reactivated in cardiac ECs during myocardial remodelling and HF [81]. Here, TNC is linked to hydrops fetalis.