In contrast, as shown in Figure 5B, the HF–HS diet did not alter the expression of several key genes involved in cholesterol biosynthesis, such as sterol regulatory element binding protein 2 (SREBP-2), 3-hydroxy-3-methyl-glutaryl-CoA reductase (HMGCR), and low-density lipoprotein receptor (LDLR). The gene discussed is HMGCR; the disease is hydrops fetalis.