Alpha diversity analysis revealed that the community richness, community diversity, and phylogenetic diversity in the positive group were higher than those in the negative group, suggesting that there may exist some correlation between immune antibodies (ACA, ANA, and GP) of recurrent abortion women and community diversity of gut microbiota, whereas, in contrast with our study, Wei et al. [33] recently reported lower rarefaction curves in the case of autoimmune hepatitis. This evidence concerns the gene BTG3 and autoimmune hepatitis.