CYGB and hydrops fetalis: The dose–response relationship between HF differential CpG sites DIO3-27_CpG_11.12 and DIO3-FA27_CpG_23.24 in routine 2 revealed the following results: RBC, PLT, HGB, NEUT, HCT, MCHC, MCV, and DIO3-FA27_CpG_23.24 showed a nonlinear association of “inverted U-shaped” and a dose–response relationship (Poverall < 0.05, Pnon-linnear < 0.05).