Fig. 1From: Association between the vaginal microbiome and high-risk human papillomavirus infection in pregnant Chinese womenVaginal bacterial richness and diversity in four groups. a Chao index; b Shannon index; Student’s t-test was used to compare differences between two groups; data are presented as the mean ± SD; ***: p ≤ 0.001; **: 0.001 < p < 0.01; *: p < 0.05Back to article page