Most subamniotic hemorrhages occur after birth and are result from excessive traction on the umbilical cord at delivery. These lesions have been rarely reported during pregnancy. According to the previous reports, subamniotic hemorrhage has not been related to severe obstetrical complications. But in recent case reports, some authors reported fetal growth retardation and preterm birth associated with subamniotic hemorrhage. We present a case with subamniotic hemorrhage diagnosed at 25 weeks’ gestation. Her pregnancy ended in preterm birth by emergency cesarean section at 26 weeks. We report this case with a review of literature.