Infectious causes Chorioamnionitis Bacterial vaginosis Asymptomatic bacteriuria Acute pyelonephritis Cervical/vaginal colonization Fetal causes Intrauterine fetal death Intrauterine growth retardation Congenital anomalies• Infectious causes Chorioamnionitis Bacterial vaginosis Asymptomatic bacteriuria Acute pyelonephritis Cervical/vaginal colonization • Fetal causes Intrauterine fetal death Intrauterine growth retardation Congenital anomalies