TG and hydrops fetalis: For XF vs. HF group (p < 0.01; Table S6), the enrichment analysis revealed that the top enriched terms were primarily related to immune-related pathways, such as phagosome, Th1/Th2/Th17 cell differentiation, NF-kappa B signaling pathway, human T-cell leukemia virus 1 infection, and hematopoietic cell lineage, as well as fat-related metabolism, such as type I diabetes mellitus and the thyroid hormone signaling pathway.