IL6 and hydrops fetalis: Numerous studies have demonstrated that patients with HF exhibited raised circulating levels of other inflammatory cytokines, such as interleukin- (IL-) 1β and IL-6, and several chemokines, including monocyte chemoattractant peptide- (MCP-) 1, IL-8, macrophage inflammatory protein- (MIP-) 1α, and galectin-3 [9–14].