RAB4A and hydrops fetalis: Likewise, among the DEGs that showed lower expression in B6J mice compared with in B6N mice, four genes: Nnt, WD repeat and FYVE domain containing 1 (Wdfy1), dynein light chain Tctex-type 1 (Dynlt1), and RAB4A, member RAS oncogene family (Rab4A) in the ND group and three genes: Nnt, Wdfy1, and Dynlt1 in the HF group were identified.