The 4 causes of postpartum hemorrhage (PPH) are often remembered using the "4 Ts". These are:
The 4 Ts of Postpartum Hemorrhage
| Cause | Explanation |
|---|---|
| Tone | Uterine atony, or a soft and weak uterus after delivery, is the most common cause of PPH. The uterus fails to contract adequately after childbirth. |
| Trauma | Injuries to the birth canal during delivery, such as lacerations or hematomas. |
| Tissue | Retained placental fragments preventing the uterus from contracting properly. |
| Thrombin | Coagulation disorders preventing proper blood clotting. |
