In pregnant women, higher levels of Veillonella bacteria in the mouth were linked to higher levels of Prevotella bacteria.

In pregnant women, having more Veillonella bacteria in the mouth was linked to lower blood pressure readings.

In pregnant women, the amount of Prevotella bacteria in the mouth wasn't linked to blood pressure levels.

Pregnant women who later got preeclampsia had less of a specific bacteria called Veillonella parvula in their mouths compared to women who stayed healthy during pregnancy.