“…Specifically, it has been investigated the role of the Gram-negative periodontal pathogen FN, an opportunistic pathogen agent having a specific role in pathogenesis of different periodontal conditions [1], [4], [8], [9], [10], [11], [12], [13], [14], [15], [16], [17], [18], [19], [20], [21], [22], [23], [24], [25], [26], and it is increasingly recognized as an important agent of PTB. A multitude of studies has identified potential periodontal pathogens that might have a causal role in determining the risk of PTB, evaluating the combined influences of genes with intrinsic and extrinsic environmental factors [45], [46], [47], [48]. These investigations have been pivotal in providing resources for the explanation of the potential impact of microbiome dysbiosis on poor obstetric outcomes [15], [16], [17], [18], [19], [20], [21], [22], [23], [24], [25], [26].…”