Does bv always lead to preterm labor or miscarriage? what is the chance of these problems to occur if recurrent?

Infection: Yes. Untreated infection can cause damage to you and increase complications with the pregnancy.

No: Bacterial vaginosis, while increasing the risk of preterm delivery, does not mean it will absolutely happen. There is little evidence it has any effect on miscarriage rates. If you have chronic BV or recurrent bouts of the condition, then you need to talk to your OB about your concerns with regard to pregnancy problems and options for treatment.

No: Bacterial vaginosis is associated with preterm labor, low birthweight babies, preterm premature rupture of membranes, and third trimester miscarriage. However, most women with BV have completely normal pregnancies. Additionally, treatment can reduce the risk of some complications.