No significant difference in Slug expression was observed between ectopic endometria in the proliferative and secretory phases (Fig. 4d-f, p > 0.05); however, ectopic endometria of adenomyosis in both the proliferative and secretory phases showed significantly increased Slug expression compared with normal endometria (Fig. 4d-f, p < 0.01). The gene discussed is SNAI2; the disease is adenomyosis.