<unk> and its tissue layers The<unk>  is the nonpathogenic, commensal bacteria claimed to be present in a healthy human<unk> and is distinct from bacteria that cause infection and preterm birth in chorioamnionitis. Until recently, the healthy<unk> was considered to be a sterile organ but now genera and species have been identified that reside in the basal layer. It should be stressed that the evidence for a<unk>  is controversial. Most studies supporting the existence of a<unk>  lack the appropriate experimental controls, and it has been found that contamination is most likely responsible for reports of a<unk> . The<unk>  more closely resembles that of the oral microbiome than either the vaginal or rectal microbiome.
Placental microbiome
Uterine microbiome
Human milk microbiome
Fetal viability
Fetal circulation
Vaginal flora
Human microbiome
Prenatal nutrition