Enrichment analysis of the Sankey bubble map showed that the FGF family was also enriched in the MAPK, PI3K-AKT, RAS, and RAP1 pathways, as well as other pathways related to HF development and regeneration, suggesting that the FGF family and its receptors are involved in the regulation of HF processes (Figure S3). Here, AKT1 is linked to hydrops fetalis.