TNNI3 and hydrops fetalis: Following RD, no significant alterations were detected in plasma NE or RAAS components (angiotensin I and II), with no biochemical evidence of HF (B‐type natriuretic peptide [BNP] < 100 pg/mL) or myocardial necrosis (cardiac troponin I [cTnI] < .01 ng/mL) (Table S3).