Arrange the procedural and surgical interventions for postpartum hemorrhage secondary to refractory uterine atony in order from least invasive to most invasive.

The slides list tamponade and compression sutures as conservative surgical options, followed by vessel ligation and, when necessary, radical surgery such as hysterectomy. Individual decisions depend on the patient and response to treatment. **Key takeaway:** Escalate promptly while balancing haemorrhage control and fertility preservation where feasible.\n\n**Glossary:** **Tamponade**: pressure applied within the uterus to control bleeding.