Maternal microbiota has been indicated as one significant reservoir for pioneering microbes in infants. Yet, the different and same features of the mother-infant gut microbiota at numerous taxonomic resolutions and metabolic features across the cohorts and capacity of another in fact prediction depending on the paired mother gut microbiota remains unclear. For a study, researchers examined 376 mother-infant dyads (1,024 infant samples and 468 mother samples) of eight studies from six different countries and examined numerous varsity at species and strain levels in the maternal gut microbiota yet not their metabolic functions. Some 290 species samples were shared at the mother-infant-infant dyad, along with 26 species (five at strain level) examined across cohorts. The profile of the mother-infant has common species and strains were then examined further by delivery mode and feeding regimen. The mother-sourced species in infants showed the same strain heterogeneity however more metabolic functions as compared to some other source species, recommending the compared stability and fitness of the non-shared and shared species and the likely role of the shared species in the early gut microbial community, respectively. Predictive mother-infant models showed accurate performance for shared species and strain occurrences in infants. The mother-infant experienced the same species and the burden might be considered as the primary aim for the future work for the infant microbiome growth and probiotic exploration.