Conclusions: Consistent condom use was associated with a decrease in the risk for bacterial vaginosis and associated vaginal microflora.

Do condoms prevent BV?

Consistent condom use was associated with reduced BV prevalence at 6 months for women who were BV-negative at baseline, but had no effect among women who were BV-positive at baseline. Male condoms appeared to protect against BV occurence, but not BV recurrence.

What causes BV to flare up?

BV is linked to an imbalance of “good” and “harmful” bacteria that are normally found in a woman's vagina. Having a new sex partner or multiple sex partners, as well as douching, can upset the balance of bacteria in the vagina. This places a woman at increased risk for getting BV.