Subsequently, we identified a series of cell-type-specific expressed novel marker genes, including TCHH, CXCL14, KRT35, GSG1, CRISP2, LOC102177231, LOC102176685, LOC102184223, LOC102177855, and LOC102178129, which provided valuable information to distinguish HF cell types of other species. Here, TCHH is linked to hydrops fetalis.