English language / Clinical Trial / Pregnancy / Humans / Female / American / Selection Criteria / Risk factors / Meta Analysis / Newborn Infant / Odds ratio / Study design / Bacterial infections / Risk Factors / English Language / Bacterial Vaginosis / Gestational Age / Fetal death / Preterm Delivery / Prospective Study / Control Group / Amniotic Membrane / American / Selection Criteria / Risk factors / Meta Analysis / Newborn Infant / Odds ratio / Study design / Bacterial infections / Risk Factors / English Language / Bacterial Vaginosis / Gestational Age / Fetal death / Preterm Delivery / Prospective Study / Control Group / Amniotic Membrane