Association between Pathogens and Periodontal Status of Chinese Women during Pregnancy and within One Year after Delivery

Non-stimulated whole saliva samples were collected from a total of 84 pregnant women (including 29 during the first trimester, 29 in the second trimester, 26 at the end of pregnancy), 33 postpartum women, who were chosen randomly. The plaque index (PlI), sulcus bleeding index (SBI), periodontal probing depth (PPD) and attachment lost (AL) were recorded. Periodontal microorganisms including porphyromonas gingivalis (Pg), prevotella intermedia (Pi), prevotella nigrescens (Pn) were detected by using 16S rRNA based polymerase chain reaction (PCR) method.