Additionally, this study will explore the relationship of various health behaviors and health status to the presence of perinatal infections. A total of 1,500 pregnant women will be enrolled in the study. A matched case-control study will be conducted at the end of the data collection period to evaluate the use of markers for the prediction of infection related perinatal mortality and infection related SPTD. All investigators and laboratory personnel will remain blinded to the identity of specimens through the use of unique study identifier numbers. Collected data will then be unblinded, analysed, and correlated with the previously collected demographic, obstetrics, and neonatal outcome, microbiology and histopathological data.