COL15A1 and hydrops fetalis: The genes from which these circRNAs originate (COL15A1, DOCK7, ADAMTS5, HADH, COL3A1, TGFBR3, ISM1, ARL13B, POSTN, KCTD9, KRT77, SEMA3C, CTNND1, DKK3, ZNF114, and FTO) are involved in the HF growth process [38,39,40,41,42,43,44,45,46,47,48,49,50,51,52].