Fig. 2
Changes in the characteristics of gut microbiota in control (unexposed) rats in the course of a normal pregnancy. a Alpha-diversity of gut microbiome revealed by Shannon, Simpson, and Chao1 index. b The beta-diversity was revealed by non-metric multi-dimensional scaling (NMDS) analysis. c The unique and sharing operational taxonomic units (OTUs) numbers were presented in Venn diagram. D0 Ctrl means rats in control group before mating, d10 Ctrl and d17 Ctrl means the control rats in GD 10 and GD 17, respectively