Fig. 2

The signature OTUs identified in the different sites of female reproductive tract were shown, including a vagina (CL), b posterior vaginal fornix (CU), c cervical mucus (CV), d endometrium (ET) and e peritoneal fluid (PF). Blue bar and purple bar note higher abundancy were occurred in EMS patients and healthy women, representatively. The signature OTUs were defined by Wilcoxon-rank sum test with p value < 0.05