In this study, the effect of intravenous administration of Tranexamic Acid and Misoprostol on postpartum bleeding will be checked. Patients with more than 500 ml bleeding after vaginal delivery and more than 1000 ml after cesarean are enrolled. Women, who have delivered vaginally or by cesarean section with spinal anesthesia in Al Zahra Hospital, are entered into the study. Women who have severe medical or surgical illness and have allergy an TXA or severe preeclampsia are excluded. The sample size is 200, which 100 people will be in each group. The first group after usual treatments gets 5 tablets of rectal misoprostol (200 microgram), another group will receive 1 gr intravenous TXA . If bleeding do not be controlled, TXA will be repeated after 30 minutes. Blood volume has been considered as the primary outcome. In this study, a patient, a doctor of medicine which is given to each of the two groups, are not aware. The questionnaire will be completed by a person unaware. In this study, Rate of primary HB Is compared after 12 and 24 hours, the need for transfusion, stability of the patient's hemodynamic and finally, effect of intravenous TXA and misoprostol will be compared..