Introduction
PRETERM BIRTH, PRETERM DELIVERY
Preterm birth affects approximately 5% to 11% of births worldwide, with variation by country, ethnicity, or other factors. This figure has remained constant despite different preventive strategies or treatments.Debate remains regarding the effectiveness of screening and treating BV during pregnancy.Recently, molecular biology has been shown to more accurately identify vaginal microbiota than other methods.Differences in the choice of treatments represent another major factor in the difficulty in interpretation of previous studies. There are international and national recommendations for the use of metronidazole or clindamycin for at high risk of preterm delivery pregnancies with a diagnosis of BV.