Regarding the innervation of the inflamed uterus, it is known that in the gilts with endometritis, the numbers of uterine perikarya expressing noradrenaline (NA), neuropeptide Y (NPY) and vasoactive intestinal peptide (VIP) in the CaMG35 and PCG36 as well as the sets of uterine perikarya containing substance P (SP) and galanin (GAL) in the DRGs7 were increased. Here, VIP is linked to endometritis.