SLC18A3 and hydrops fetalis: Remarkably, the density of VAChT fibers in HF + RE was similar to the CH control group, and the HF + SU group displayed slightly improved VAChT innervation (Fig. 4C–H) and tyrosine hydroxylase (TH) density compared to HF and HFHC animals (p < 0.05; Fig. 4I–N).