After receiving uterоtоnic medicаtiоns, IV fluids, аnd continued fundаl massage, Maria's uterus becomes firm and bleeding decreases. Her vital signs stabilize at BP 106/68 mm Hg and HR 98 bpm. The provider orders tranexamic acid (TXA) 1 g IV. You as the nurse understand that the rationale for administering tranexamic acid in postpartum hemorrhage is: