Leptin mRNA expression was positively correlated with CART and POMC expression in Re-LF group (CART, r = 0.88, P < 0.01, Fig. 7c; POMC, r = 0.84, P < 0.01, Fig. 7d), whereas no significant correlations were observed in FR group (CART, r = −0.35, P > 0.05, POMC, r = −0.63, P > 0.05) and Re-HF group (CART, r = 0.55, P > 0.05, POMC, r = 0.17, P > 0.05). The gene discussed is POMC; the disease is hydrops fetalis.