Research suggests that the transfer of genes between a mother's microbiome and her newborn's microbiome plays a role in shaping the infant's development. The maternal microbiome may influence the baby's gut health and disease risk, with some studies indicating a possible link to conditions such as autism and ADHD. The relationship between the maternal and infant microbiomes appears to be complex, with evidence of bidirectional interactions and potential influences from bacterial strains in breast milk.