Based on the findings of this study, appropriate interventions to address reproductive tract infection (RTI) could be developed and field-tested in Pakistan. We expect that these interventions, once successfully field-tested, could be widely used to improve maternal and child survival in Pakistan and other developing countries. Given the critical state of maternal and child health in Pakistan, and considering the emerging evidence that infections could lead to poor pregnancy outcomes, this study is extremely relevant and timely, and it has the potential to contribute significantly toward the improvement of reproductive health in Pakistan. Primary outcome is perinatal mortality. Secondary outcomes include birth weight; spontaneous delivery occurring before 37 weeks gestation; rupture of fetal membranes before 37 weeks of gestation; and maternal death. The sample size was based on 25% prevalence of BV in the control group; 10 percent dropout rate; 80 percent power; and a two-tailed type I error of 0.05.