CHSY1 and endometritis: As shown in Figure 5, compared with the control group, circ-Chsy1, circ-Gm49339, mmu_circ_0001853 were significantly overexpressed (p < 0.01), and circ-Vps54 and mmu_circ_0000668 were significantly underexpressed in the endometritis group (p < 0.01).