Pregnant women are at increased risk for BV because of hormone changes that happen during pregnancy. Hormones are chemicals made by the body. If you have BV during pregnancy, your baby is at increased risk for premature birth and low birthweight.

Is BV common in early pregnancy?

Approximately 10% – 30% of pregnant women will experience bacterial vaginosis (BV) during their pregnancy. BV is characterized by a shift from a healthy vaginal microbiome – one dominated by acid-producing bacteria (the healthy bacteria, such as lactobacillus) – to a vagina dominated by unhealthy bacteria.

What is the real cause of BV?

BV is often caused by gardnerella vaginalis, the most common type of bacteria in your vagina. Anything that changes the chemistry of your vagina's pH balance can mess with bacteria levels and lead to infection — like douching or using vaginal deodorants and other irritating products.