A higher expression of Rbp4 gene was observed in the groups of animals kept on HF/HF, HF/CD, and CD/HF as compared with the CD/CD group (Figure 2(b); Tables 1 and 2). Rbp4 gene expression was also significantly stronger in the HF/HF than in the HF/CD group (Figure 2(b); Tables 1 and 2). Here, RBP4 is linked to hydrops fetalis.