The highest concentrations of IL-1β and IL-8 were found in the subset of pregnant women with BV, compared to all other subjects (IL-1β: 2.31 ± 0.77 versus 1.43 ± 0.87 pg/mL, P < .001; IL-8: 3.33 ± 0.83 versus 2.86 ± 0.76 pg/mL, P < .001). Here, IL1B is linked to bacterial vaginosis.